Urban Trees, Stormwater & Green Streets - Stormwater Management - - PowerPoint PPT Presentation

Urban Trees, Stormwater & Green Streets

• Stormwater Management through Urban Forestry -

TONIGHT’S DISCUSSION TOPICS

• Urban Forests, Trees and

Watersheds

• The Urban Tree Canopy
• An Introduction to Green Streets
• Trees, More Trees and the Tree

Owners Manual

Table of Contents

______________________________

What Trees Do Benefits of the Urban Forest Components of a Watershed Urban Tree Canopy (UTC) Benefits of Green Streets Green Infrastructure Tools Tree Selection & Placement Planting Your Tree Properly Pruning Young Trees

• Aesthetics
• Screening
• Clean Air
• Reduce Runoff and Erosion
• Temper Climate
• Save Energy
• Create Wildlife

Habitat

• Improve Health
• Emotional Well Being
• Strengthen Community
• Economic Values

DID YOU KNOW?

• Trees give us oxygen, clean the air, and filter airborne pollutants.
• Trees conserve energy. Just three strategically placed trees can

decrease utility bills by 50%.

• Urban trees in the U.S. remove 711,000 tons of air pollution annually, at a

value of $3.8 billion.

• Trees and vegetation can raise property values up to 37%.
• Trees can reduce annual storm water runoff by 2% – 7%.
• The net cooling effect of a healthy tree is equivalent to 10 room-size air

conditioners operating 20 hours a day.

DID YOU KNOW?

• Trees clean the air by absorbing carbon dioxide, sulfur dioxide,

nitrous oxides and other pollutants.

• Trees shade cars and parking lots, reducing ozone emissions from

vehicles.

• Trees filter airborne pollutants and reduce the conditions that cause

asthma and other respiratory problems.

• Get trees. Get healthy. Children and youth living in greener

neighborhoods have lower body mass index.

• Trees reduce noise pollution by absorbing sounds.
• Urban trees in the U.S. store 700 million tons of carbon valued at $14

billion with an annual carbon sequestration rate of 22.8 million tons per year valued at $460 million annually.

HOW DO TREES BREATHE ?

! In leaves, water combines

with carbon dioxide and sunlight to make sugar — food for the tree. During this process, called photosynthesis, the tree also produces oxygen.

! Oxygen and water then

evaporate through the leaves — a process called transpiration.

! This is how a tree

breathes.

HOW DO TREES DRINK?

! Water in the soil passes into tiny hairlike roots. It enters the root

loaded with minerals from the soil, and is carried up the tree’s trunk all the way to the leaves.

ROOTS DO MORE THAN DRINK…

HOW MUCH WATER DOES A TREE DRINK?

! A healthy 100-foot-tall tree has about 200,000 leaves. A tree this

size can take 11,000 gallons of water from the soil and release it into the air again, as oxygen and water vapor, in a single growing season.

! Leaving stream and river banks as natural as possible — with the soil undisturbed

and covered with trees, shrubs, wildflowers, mosses and ferns — helps prevent erosion.

! A stream bottom filled with pebbles — rather than a dirt-filled bottom — is one

sign of a healthy stream.

STREAM SIDE BUFFER

URBANIZING WATERSHEDS

!Increased !Impervious Surfaces

! Roads, roofs, pools,

sidewalks, parking lots

!Storm water !Flash Flooding !Peak Flow !Floodplain

development

IMPACT OF STORMWATER & IMPERVIOUS AREA

! More Extreme Droughts ! Lower Low Stream Flows ! More Frequent & Severe

Flooding

! Less Groundwater

Recharge

! Water Quality Impacts

THE URBAN STORM HYDROGRAPH

GREATER PEAKS & VOLUME

Urban&vs&Forested& Storm&Hydrographs&

50 100 150 200 250 300 350 400 2 4 6 8 10 12 14 16

Time Flow&Rate

Urban Forested

å

GOALS OF GREEN STREETS

• Greening & Urban Beautification
• Canopy Cover
• Urban Heat Island Mitigation
• Habitat & Food for Wildlife
• Traffic Calming

OFFERING A SOLUTION TO URBAN STORMWATER

GREEN STREETS

• Streets comprise a significant percentage of publicly owned

land in most communities, thereby offering a unique opportunity to incorporate green street elements that will not only protect the environment, but can improve community health and prosperity.

• Green streets incorporate a wide variety of design elements

including street trees, permeable pavements, bioretention, and swales. Successful application of green techniques will encourage soil and vegetation contact and infiltration and retention of stormwater.

BENEFITS OF GREEN STREETS

!

TREES ARE GOOD FOR THE ENVIRONMENT – ECOSYSTEM SERVICES

!

TREES ARE GOOD FOR BUSINESSES

!

TREES ARE GOOD FOR OUR NEIGHBORHOODS

!

TREES ARE GOOD FOR THE ECONOMY

!

HAPPIER AND HEALTHIER RESDIENTS

!

TREES HEAL AND HELP YOU LIVE LONGER!

!

TREES MAKE FOR A SAFER COMMUNITY

!

TREES ADD ECONOMIC V ALUE TO A COMMUNITY

!

TREES ADD TO PRIDE OF PLACE AND NEIGHBORHOOD PRIDE

BENEFITS OF GREEN STREETS

GREEN PARKING LOTS

GREEN PARKING LOTS

NYC GREEN STREETS

111th Street, Queens

NYC GREEN STREETS

Cross Bronx Expwy & Fulton Ave, Bronx

NYC GREEN STREETS

10th Ave & 14th St, Manhattan

NYC GREEN STREETS

Waldo & Greystone Aves, Bronx

Amboy Rd & Richmond Valley Rd, Staten Island

NYC GREEN STREETS

NYC GREEN STREETS

Nashville, Blvd., Manhattan

NYC GREEN STREETS

Nashville, Blvd., Manhattan

STORMWATER CAPTURE TOOLS

Pipe&Inlets Curb&Inlets Surface&Edging Trench&Drains Bioswale&Grading Deep&Excavation

GREEN INFRASTRUCTURE TOOLS

BIOSWALE)(WITH)TREES): A)bioswale is)a)linear)vegetated) swale)that)channels)stormwater,) infiltrating)and)filtering)it)with) vegetation)and)soils)as)it)travels.

BREAK&OUT:

BreakEouts)are)excavated)areas) filled)with)structural)soil,)often) under)sidewalks)or)roads.) Used)in)combination)with)other) green)infrastructure)tools)such)as) tree)trenches)or)stormwater planters,)breakEouts)provide)more) room)for)tree)roots)to)grow)in)tight) spaces,)increasing)the)longevity) and)survival)rate)of)urban)trees.

GREEN INFRASTRUCTURE TOOLS

COVERED TREE TRENCH:

A)covered)tree)trench)is)a)linear) system)of)trees)connected)by) structural)soil)underground)and) covered)with)permeable)pavers.) Stormwaterflows)into)the)trench) via)inlets)or)runnels)and)through) the)permeable)pavers,)infiltrating) into)the)soil.)The)continuous)mass)

• f)soil)combined)with)soil)breakE
• uts)under)sidewalks)and)streets)

gives)roots)more)room,)increasing) vitality.

OPEN,TREE,TRENCH:

like a covered tree trench, an

• pen tree trench is a linear

system of trees connected by structural soil underground, but it is filled with vegetation, not covered with permeable pavers. Stormwater flows into the trench via inlets and infiltrates into the

• soil. The continuous mass of soil in

combination with soil break-outs into sidewalks and streets gives roots more room, increasing vitality.

WHY PRUNE YOUR TREES

PRUNING TOOLS

ESTABLISHING A STRONG SCAFFOLD STRUCTURE

PRUNING YOUNG TREES

Making the Cut

• 1. Bottom Cut
• 2. Top cut
• 3. Finish cut