Rain Garden – Turn Rain Into Beauty In Your Garden

When it rains, we enjoy hearing the sound of raindrops on our roof.  After a drought of so long in California, those drops sound more like music to our ears. While enjoying the music, have you thought about where the stormwater goes to?  Well, most of it just goes down the sewer, into the creeks and rivers, and eventually out to the ocean.  What if that water is not sent away, but reused, such as, turned into beauty in your garden?

beauty in garden
Storm water: waste or asset

In the past, stormwater has been treated as something akin to waste in cities, something that is collected and sent out to waterways in nature as soon possible.   As people realize now, there are several issues of this.

First, a big chunk of water is lost.  Rainwater is freshwater that is basically clean in most circumstances. It falls right on our roof so no transportation is required to receive that water.  However, in the current infrastructure, that much freshwater is sent right away.

“Stormwater could be a significant addition to California’s water supply. Los Angeles estimates that rainfall could provide nearly half a million acre-feet (620 million cubic meters) per year. Steven Moore, a member of the State Water Resources Control Board, said, ‘Stormwater could make a difference, it could see us through seven years of drought instead of five.’”

Another issue is pollution.  As it flows through the surface of the city, stormwater runoff collects all kinds of pollutants such as motor oil, gas, chemicals, fertilizers, pesticides, etc.  As the stormwater is discharged into the waterways untreated, the toxic substances can pollute the water and harm birds, fishes and other aquatic life that live there.

One more issue is the loss of deep water infiltration.  As the water that falls on impervious surfaces such as roof and concrete is sent right away,  water that would otherwise have gone into soil, percolated and recharged the ground water is lost.

It has become clear that rainwater is not a waste, but an asset, a valuable resource of water supply, something that we should capture and reuse.  While a common way to do so is using a rain barrel, there is another more direct way – build a rain garden.

What is a rain garden?

According to Wikipedia, “a rain garden is a planted depression or a hole that allows rainwater runoff from impervious urban areas, like roofs, driveways, walkways, parking lots, and compacted lawn areas, the opportunity to be absorbed. This reduces rain runoff by allowing stormwater to soak into the ground (as opposed to flowing into storm drains and surface waters which causes erosion, water pollution, flooding, and diminished groundwater).”

“The purpose of a rain garden is to improve water quality in nearby bodies of water and to ensure that rainwater becomes available for plants as groundwater rather than being sent through stormwater drains straight out to sea. Rain gardens can cut down on the amount of pollution reaching creeks and streams by up to 30%.”

So exactly what is a rain garden? To understand, we just need to turn our eyes to nature.

Imitate the nature

In spring time, when we go to a nature reserve or park, chances are we can see fields and fields of wild flowers.  No one ever installs an irrigation system or waters these plants; they just live and keep turning out splendid blossom, year after year.  How do they do it?

The answer is, after tens of thousands years, the native plants have adapted to the environment.  In California where it rains in winter and gets dry in summer, another area in the world that has Mediterranean climate, plants take in all the water they can get in winter, grow rapidly, and bloom in spring.  When summer comes and it becomes dry, they slow their growth or simply go dormant.  They stay this way until winter, when the rains come again.  As the raindrops come down, they “wake up” from the dormancy, drink up all that water and start to grow and bloom again.

They don’t need any additional watering; they just take all the water there is and live throughout a year.  This is what plants in a rain garden will do.

At a rain garden, the depression or ditch will collect the rainwater runoff from a roof.  When it rains, water will be collected there.  The plants in the garden will absorb the rain water, and grow; When the rain season ends, they can just live on their own.  Very little or no additional watering is needed for these plants in most cases.  Just like their brothers and sisters in the nature, they can live with just the rainwater.

Compared with water supplied to each household, which is treated with chemicals to comply with the sanitary standards, guess which water the plants like better?  Plants watered with rain water can usually grow faster, bigger, and have brighter blossom.

Designing a rain garden

Like so many lawns in California, Larry’s (not his real name) lawn turned brown during the historic drought. Though the drought ended and last winter was one of the wettest on record, the lawn did not come back . The brown lawn had been bothering Larry for a long time, but he was not sure what to do about it, until he heard that his lawn can be built into a beautiful garden; not just any new garden, but a rain garden!

One of the downspouts (the one on the left) is right next to the front yard. When it rains, the rainwater will just flow into the garden. The lawn is on a very slight slope from the house to the sidewalk, so the runoff will go outwards naturally. If a shallow basin is built close to the side of sidewalk, the rainwater can reach there and be stored in it.

That is exactly the design proposed to Larry. A small winding ditch will take the rainwater from downspout, and send it to this shallow basin. Some plants will be planted.  After they absorb the rainwater in winter, they may only need a little watering in the remainder of the year, saving a remarkable amount of water.

In addition, since the garden would meet all the requirements of Santa Clara Water District’s Landscape Conversion Rebates program, the garden can apply for the rebate.

Larry liked the proposal. It was a “Go” for the rain garden!

Installing a rain garden
  • First, the shape of the garden needs to be defined.

For the safety of the foundation, the rain garden should be some distance away. Usually it is advised that at least 10 feet of space should be left between the basin and the house.

Distance

  • Next, the shape of the rain garden is outlined.

How big should the garden be?  It depends on how much runoff the roof can produce, and design an area that can take much of that runoff.

Suppose the area of the roof is 1000 square feet, with one inch of rain, it can produce about 600 gallons of runoff.  If the rain garden is 1 foot deep, to absorb this much water, it needs an area of about 80 square feet.  If the roof area is bigger, the rain garden should be larger too.

What shape can a rain garden be?  It can be of anything  – a circle, a bean, or a peanut.  The smooth, curvy lines of these shape not only look appealing, but also reduce the force of runoff and effect of erosion.

  • Soil preparation

The bottom of a rain garden needs to be covered with a special type of soil, to help with water infiltration. It is a mixture of organic materials and coarse sand.  The bottom of the whole area that water flows by and stays should be covered with the mix.

  • Plant selection

Plants in a rain garden should be able to stand both conditions well: wet and dry. Their roots should be able to take moisture for a long time, yet also survive in hot dry summer.

One plant that fits this very well is the Douglas Iris.  A tough California native, it can be found close to beaches along the west coast.  Hardy, drought tolerant, yet tolerant of wet soil,  this is great choice for a rain garden.

The beauty of a rain garden

The garden is done!  This is before

and after

The rain garden

Rain Garden

When it rains, with a garden like this, the rainwater will be captured, and reused.  Something that was sent away before can be turned into so much beauty in our own garden!

Rethink stormwater – waste or asset?

When it rains and all the raindrops fall on our roofs, have you thought about where the stormwater go to?  Well, most of it just goes down the sewer, into the creeks and rivers, and eventually out to the ocean.

stormwater

Stormwater – a waste?

Stormwater has been treated as something akin to waste in cities, something that is collected and sent out as soon as possible.  A complete infrastructure is in place to get this done: gutters and downspouts to collect rains that fall on the rooftops, drains and catchbasins to gather runoffs from downspouts, streets and parking lots, underground storm sewers will then convey all the runoffs and discharge them to a natural water system such as a creek, river and ocean.

There are a couple issues with this.  First, a big chunk of rainwater is lost to runoff.  Rainwater is freshwater that is basically clean in most circumstances, which can be used directly for outdoor purposes, as well as indoor with proper filtering and cleaning.  It falls right on our roof so no transportation is required to receive that water.  However, in the current infrastructure, that much freshwater is sent right away, requiring another huge set of infrastructure to deliver the water we need.

stormwater runoff

Another issue is pollution.  As it flows through the surface of the city, stormwater runoff collects all kinds of pollutants such as motor oil, gas, chemicals, fertilizers, pesticides, etc.  As the stormwater is discharged into nature untreated, it pollutes the water system discharged into. Toxic substances from cars and pesticides can harm birds, fishes and other aquatic life.  Nutrients from the fertilizers can cause the overgrowth of algae, depleting oxygen in waterways and aquatic habitats.

The third issue is insufficient water infiltration for the soil under the impervious cover and in general.  As we can see in the illustration below, in a natural environment (left), 25% of water is infiltrated in shallow surface, and another 25% will percolate deep into the soil.  In a city environment (right), those figures drop down to 10% and 5% respectively, so the water that goes into soil reduces from 50% of total to a mere 15%, a 70% reduction.  The lack of deep infiltration is a big problem.  Without proper recharge, the groundwater is seriously depleted in many places.  As we rely on ground water as part of our water supply, this has a big impact for our water safety.

stormwater comparison

Lastly, waterway erosion and threat of flood.  As a huge amount of water is gathered and discharged into waterway, the volume and speed it packs can erode the banks of the stream or river; when the volume is too heavy, it can flood surrounding areas.

stormwater

Benefits of capturing and reusing rainwater

People’s thinking about rainwater has completely changed.  Now, rain water is no longer thought as waste; instead, it is viewed as an asset, something we need to capture and reuse.

  • A source of water supply

From 2013-2017, California experienced a historic drought.   At its worst point, the water content in the snowpack was only 5% of normal.  The drought was so severe, it was one of the worst in the state’s history.

California drought

After the drought, everyone realized we could no longer take the water supply as we knew it for granted. With climate change, drought might become more frequent and serious; on another hand, with economic expansion and population growth, our demand for water will just grow.  How can we build the reliable water supply that can meet our needs?

“Stormwater could be a significant addition to California’s water supply. While the potential is still unknown in the Bay Area, Los Angeles estimates that rainfall could provide nearly half a million acre-feet (620 million cubic meters) per year, said Steven Moore, a member of the State Water Resources Control Board. This may sound trivial compared to the 33 million acre-feet people use statewide each year, but it’s not. “Stormwater could make a difference,” Moore said. “It could see us through seven years of drought instead of five.”

From a cost perspective, local stormwater capture is one of the cheapest methods for water supply.  It is only more costly than urban water conservation, but much cheaper than others like recycling and ocean water desalination.

  • Reducing pollution and recharging groundwater

As the importance of rainwater is more thoroughly understood, people have been taking all kinds of steps to keep rainwater instead of letting it flow away.  In the cities, permeable surfaces are replacing the impervious ones, and more and more rain gardens have been built, in the streets, around offices and in our gardens.

When it rains, the rainwater can infiltrate the soil from the permeable surfaces and rain gardens.  In the process, harmful pollutants in the water can be filtered out; the cleaned water can percolate deep in the soil, replenishing groundwater.

Here is a storm drain at a street corner.  The catch basin around it was built into a rain garden, allowing the rain water to sink into the soil.

a rain garden at a street corner
a storm drain at a street corner
  • Reducing the threat of erosion and flood

Since water is directed away from the runoff, the total runoff volume will reduce, and the speed and energy that it packs up will lessen.  As a result, the force to erode will be smaller, and threat of flood lower.

SB231

On Oct 6 2017, SB231 was signed into law in California, making it much easier to fund and build rainwater capture projects. The key is the clarification about whether stormwater projects are subject to the exemption of prop 218:

Excerpts from SB231:

The Legislature finds and declares all of the following:

(a) The ongoing, historic drought has made clear that California must invest in a 21st century water management system capable of effectively meeting the economic, social, and environmental needs of the state.

(b) Sufficient and reliable funding to pay for local water projects is necessary to improve the state’s water infrastructure.

(c) Proposition 218 was approved by the voters at the November 5, 1996, statewide general election. Some court interpretations of the law have constrained important tools that local governments need to manage storm water and drainage runoff.

(d) Storm waters are carried off in storm sewers, and careful management is necessary to ensure adequate state water supplies, especially during drought, and to reduce pollution. But a court decision has found storm water subject to the voter-approval provisions of Proposition 218 that apply to property-related fees, preventing many important projects from being built.

….

(h) Proposition 218 exempts sewer and water services from the voter-approval requirement. Sewer and water services are commonly considered to have a broad reach, encompassing the provision of clean water and then addressing the conveyance and treatment of dirty water, whether that water is rendered unclean by coming into contact with sewage or by flowing over the built-out human environment and becoming urban runoff.

(l) The Legislature reaffirms and reiterates that the definition found in Section 230.5 of the Public Utilities Code is the definition of “sewer” or “sewer service” that should be used in the Proposition 218 Omnibus Implementation Act.

With SB231, it is clear that rainwater capture projects do qualify for the Prop 218 exempts, making them much easier to fund and build.

To summarize, facing the ever increasing demand for water and a future with possibly longer and more frequent drought, we now look at stormwater with a completely new perspective.  Gone are the days when we think of it as a waste; instead we know it is a great asset, and will try to capture and reuse it in a way that will benefit us, and the environment the best.

Birds At an Aquatic Habitat: What Changes Could You See After Storms?

In Santa Clara county where the Silicon Valley is located, Los Gatos Creek is one of the few urban streams that remains relatively intact throughout countless developments in the area during the last 200 years.  The stream originates in the Santa Cruz Mountains, flows into the Vasona Reservoir, winds through a small valley, and clears into the Guadalupe river that finally empties into the San Francisco Bay.  It is one of the many steams and creeks in the vast Guadalupe River watershed, and a habitat for many wetland species.

Los Gatos Creek Map

Watersheds are critical habitats for birds, fishes and other animals that live a wetland environment.  200 years ago, before any of the modern developments, the creek must have been a heaven for the birds and fishes.  At the time, all kinds of birds could be seen flying in the sky and resting in the creek; fishes swimming through the creek in massive numbers.

Unfortunately, in the 200 years since, “about 90% of California’s original aquatic habitat has been altered or destroyed through human activities”, more than any other states in the nation.  What we see in Los Gatos Creek today is one of the 10% that remains.

Los Gatos Creek

Today many of the parks like Los Gatos Creek often provides the only refuge in urban areas for native wetland species.  They have been living here for tens of  thousands of years.   During migration season some species of birds will also come and use the place as a resting area, critical for their survival.  If the park no longer exists, or its environment dramatically changes, it can be devastating for all the birds that have been depending on it for so many years.

Bird sightings at normal time

The birds that can be seen most often are Canadian goose.

Los Gatos Creek

Canada Goose

Great egret and snowy egret can also be seen from time to time.

snowy egret

This was in the migration season of November.  These birds were taking a rest before they flew out to their next destination.

Bird sightings after storms in 2016 winter

After an epic, historic 5 year drought, starting from late fall of 2016, California went from extremely dry to extremely wet, with record breaking rainfalls.   Heavy rains pummeled from late fall all the way  into spring, in some places floods and mudslides occurred.  At Los Gatos creek, parts of the trail were also flooded several times.

Flood

The new “stream” in the previous trail was quickly discovered by some lovely “guests”.  They came in swiftly, playing in this new playground of theirs, relaxing, fishing and enjoying a good meal!

Feeding

Same as these ducks, quite some birds found out the new water and came right in.  Here is normally what you would see when you cross a bridge to enter the trail and look down at the water .  The right side of the creek bed is completely dry.  On the morning after several heavy storms in January, though, the whole span of the creek bed was fully filled with flood water.  On the muddy yellow water you could see these two little birds, guests that were not seen here before.

Creek

Two Birds

They are hooded mergansers.

After you walked a bit more along the trail, there was another surprise waiting.  A Double Crested Cormorant was “relaxing” on a tree, which was never seen here either.  She streatched her wings, turning her head from left to right, right to left, then left to right….with the kind of excitement of a baby.  In the second photo, the two small birds could also be seen swimming in the same place.

Bird

Bird 2

The cormorant really liked it here. In the next 2-3 weeks you can see her swimming, resting and relaxing in this particular spot.

Bird

Bird

Bird

Even more surprises ahead.  After you went further down the creek and came to this spot – Look!  literally a bird’s paradise.  So many birds, of different species, gathered here, rested in this comfy patch made from branches and grasses brought by the flood water.  The patch was right in the middle of the creek, providing the birds all they needed: food, shelter, and a fun place to hang out.  After just one  day, though, the patch was gone, so went all the birds.  Such a view was not seen again.

birds after storm

A great blue heron, and a great egret:

Birds

In the next 2-3 weeks when it continued to rain hard, more birds usually unseen could be found at the creek.

Bird

Bird

2 couples of the mallard duck.  Look at that beautiful blue stripe.

A big group of the American coot, on the flooded trail.  While coots can be seen often, such a big group was only seen during this time.

birds

A big bird was seen here at the tree right beside the trail, towards the end of the rainy season. She really enjoyed the tree and stayed on it for hours, ignoring all the people who passed by on the trail.  She was seen only once.  This is a black-crowned night-heron.

Bird on a tree

Birds, habitat, and water

The heavy rains at Los Gatos Creek gave us a valuable opportunity to observe how a sudden increased level of water would mean for the creek habitat, and the ecosystem.  If we just look at the birds, the answer is clear: they loved all that water.  While we don’t have a count for the birds’ numbers during the storm time, the number of species, and the size of the bird groups we saw, increased quite significantly.  This happened with just 2 months of storms, one could only imagine how it would turn out if the same rains continued for a longer time.

In the last 5 years, when California experienced the epic drought, the birds, and the whole ecosystem at the aquatic habitats must have been very stressed.  They lost a big chunk of their habitat; at the habitats that did remain, water was way more scarce than usual.  As Professor Peter Moyle from University of California, Davis pointed out, “Drought is hard enough on us, and on farmers, and cities, and so forth.  It’s really hard on the fish, really hard on the aquatic and riparian systems.”

Continue with water conservation

Water will just become more scare in the future, relative to our demand for it, with population growth, economic expansion, and climate change.  How can we manage and use it , so that we not only will have enough for ourselves, but also for the birds and fishes in the aquatic and reparian habitats?

While all kinds of solutions are being explored, one thing is clear: we must continue to conserve water,  which is the easiest and cheapest solution among all.  In California, we use half of our water in outdoor landscaping.  If we can all switch to water efficient gardening, we can surely save a significant amount of water.  As we see in the picture, when we save water with drought tolerant plants like these Mexican bush sages, we no only save for us, but also those birds in the creek.

Lake

 

Drinking Water: a Vital Part of Our Life

We all know how important water is to us – drinking, washing, cooking, showering, watering – all part of the things we do with it every day.  Water, and clean drinking water, is essential to all of us.

For most of us, when we turn on the tap, water will flow – it comes so natural that we rarely think about where the water comes from, and how they came here.

To have access to clean drinking water is central part of human activities since the ancient time.  To have such access, sometimes huge infrastructures are built over a vast territory.  The aqueducts in Roman Empire is one of the most distinguished examples.

Roman aqueduct and drinking water

According to “Roman aqueduct” in Wikipedia, “The Romans constructed numerous aqueducts in order to bring water from often distant sources into cities and towns, supplying public baths, latrines, fountains and private households…Rome‘s first aqueduct supplied a water fountain sited at the city’s cattle market. By the 3rd century AD, the city had eleven aqueducts, sustaining a population of over a million in a water-extravagant economy”.

The Roman aqueduct represents one of the greatest engineering achievements in the pre-industrial era.  This is one of the 11 aqueducts in Rome, Nero aqueduct, which was built by the infamous emperor that drew water from Claudia aqueduct and sent to his own palace:

Aqueduct

Thanks to the aqueducts, water is available everywhere in Rome.  It is one such city that you may get around without bringing a bottled water.  These water fountains are everywhere.  They are called “Nasoni”, from the Italian “nasone” (big nose).  The water from it tastes good and is safe to drink.

Drinking Water Fountain 1

California: complex water infrastructures and networks

In California, to support the big population across the state (close to 40 million as of 2015) , there are vast regional and local water systems.  In addition, huge and complex water infrastructures were built to transport water from water abundant areas, e.g., Sierra Nevada snow mountains, to where they are needed, on top of the local supply.  Some of the projects include:

  • Central Valley project, that transports water to the farmlands in central valley; and
  • State water project, that delivers water to Southern California.

In addition to surface water, underground water also plays a vital role, providing some 30-40% of the state’s total water supply, which goes much higher in dry years.

When we have a sip of water from a fountain in the San Francisco Bay area, that water may come from melted snow in Sierra Nevada, and travel hundreds of miles in the vast water network before it arrives in the west coast.  It takes a lot of work and huge projects for the water to be delivered to every corner like it is today.

Snow n Water

Drinking Water Fountain 2

Pollution: Drinking Water Problems

One of the most serious problems related to drinking water is pollution.

Bottled water, and the plastics that come along with it, has become a big hazard for our water, especially our ocean and environment.  Americans used about 50 billion water bottles a year, however, only 23% were recycled, that means  77% or 38 billion bottles went into landfill, streams, rivers and eventually ocean.  There they will not dissolve, but break into smaller pieces which will be ingested by sea animals. This is not a good situation.

Another big problem is the chemicals from medicines and personal care products.  After the medicines are dumped into toilet, and the shampoos and sunscreens are used and rinsed off in shower, the chemicals will go into sewage and then wastewater treatment facility.  Though water are treated at the facilities, they are not designed to treat the thousands of chemicals present, which will then be released back to the rivers and oceans.   These pollutants can be hazardous to aquatic animals. An ingredient in sunscreen can harm the coral reefs.  The oceans are so polluted now that the dolphin’s immune systems are failing.

With the huge water cycle in nature, some of the chemicals make their way back and can be found even in treated drinking water, so in the end it can be harmful to our own health too.

2017-04-13-13h18m58

Improve Water Efficiency: Recycle, Reuse

Water is a precious resource needed by everyone. How can we best use such a resource?  As Felicia Marcus, Chairman of California Water Board put it:  “In Southern California and the Bay Area, we have this massive infrastructure to transport water from the mountains, use it once, and then send it out to sea. Instead, we should be capturing more rainwater, recycling it, and reusing it over and over. ”

As Californians learned in the historic 5 year drought, replacing lawns with water efficient gardens can  save water significantly which helped us cope with the drought.  The next step will be to capture and store more of the rainwater, and reuse it.  Use permeable materials in the garden, harvest rain water with a rain barrel, install a rain garden: these are some of the things we can do to further improve the efficiency of our water.

 

garden

Storm Water – Not a Waste But a Valuable Resource of Water (1)

Vasona park and the adjacent Los Gatos Trail is a favorite place for many locals who live in the South Bay of the San Francisco Bay area.  The long trail along the picturesque creek and reservoir provides a perfect place for people to walk, run, or just to relax and enjoy.  In the last couple weeks, though, as like so many other places in Northern California, the heavy storms flooded part of the trail.  The creek turned muddy yellow, roaring downstream at a much faster pace than normal.

Stormwater flooded Los Gatos trail

The creek literally has become a river.  It did not just flow out of the creek banks; in this particular area it flooded the whole place, including the trail, until it was blocked by the higher bank, off which the trail’s parking spaces sit.  The flow was so powerful that it knocked down a pole of the trail’s fence.

Flood at Los Gatos Creek

Fence Pole

Nowhere was the storms’ effect more apparent than at the dam of Vasona Reservoir. Usually the dam gates were closed, the creek tranquil; now the gates are wide open, with a huge volume of muddy storm water tumbling down, making a spectacular fall.

dam before storm

dam after storm

dam after storm

Storm Water Benefit  – Recharge Ground Water

While the heavy storm water did flood part of the trail, the water itself is not a waste; on the contrary, it is a very valuable resource.

One of Los Gatos Creek’s major functions is to recharge ground water. According to the park’s official website:

“Surface water runoff from the watershed that drains into Los Gatos Creek is captured by Lexington Reservoir in the Santa Cruz Mountains. That water is then used to recharge, or refill, the valley’s groundwater basin. Reservoir water is released and carried to recharge ponds via the creek. Water held in the ponds seeps or “percolates” through the earth’s layers until it reaches underground aquifers. This percolation process helps clean the water before it reaches the underground storage basin.

All along Los Gatos Creek you will see groundwater recharge in action. Water released from Lexington Reservoir flows to Vasona Lake where a system of gates at the dam releases water downstream to the percolation ponds at Los Gatos Creek County Park and Budd, Camden, McGlincey, Oka Lane, Page and Sunnyoaks ponds. Ultimately, the creek joins the Guadalupe River and flows northward to San Francisco Bay.”

Here is one of the percolation ponds at the creek:

percolation pond

Ground water is an important source of water for California.  In the last several decades, overpumping has seriously depleted a lot of the ground water, sinking the land across the state.  The historical drought in the last 5 years made the depletion even worse, exacerbating an already severe situation . It is critically important to recharge the ground water, and the storm water this season is badly needed.

Storm Water Benefit  – Water for Trees

Walking along the creek one can see quite some trees toppled in the storm.

tree toppled in a storm

While some trees may simply just be brought down by the force of the wind and flow, for  some other trees, it was the drought – they were so weakened by the time of the storm.

Since 2010, more than 102 million of trees have died in the California forest stressed by drought and infected by beetles, estimated the U.S. Forest Service.   As trees are so vital for the environment,  this is not something anyone would like to see.  The storm water can help quench the thirst of the trees, helping them stay healthy and live much longer.

Storm Water Benefit  – A Richer Habitat for Birds

A happy surprise one would discover walking along the creek was birds rarely seen before.   While some birds, e.g., Canada Geese, Great Egret, and Mallard Ducks  can be seen all the time, a much bigger variety showed up after the storms:

birds after storms

birdafterstorm
Double-crested Cormorant

birdsafterstorm

Like a lot of wetlands in the state, Los Gatos creek was a bird’s paradise a long long time ago, but human activities took away most of the habitat.  The drought just made it much worse for the birds.  Now, with the abundance of water and food brought by the storms, more birds came back.  It is clear that water is essential for the health of wetland’s ecosystem, and storm water plays a big role in it.

Net, from Los Gatos creek, one can see storm water is such a valuable resource.  It can recharge ground water, de-stress the trees, and help provide a habitat for birds.  It is not a waste that should be flown out to the ocean as soon as possible; rather, it is something that should be captured, stored and reused, so we can achieve a much higher efficiency for the water we get.