Erosion Control Practices

choppedspleenΜηχανική

22 Φεβ 2014 (πριν από 3 χρόνια και 3 μήνες)

71 εμφανίσεις

Maryland

Assateague Coastkeeper

Baltimore Harbor Waterkeeper

Chester Riverkeeper

Choptank Riverkeeper

Patuxent Riverkeeper

Sassafras Riverkeeper



Severn Riverkeeper

South Riverkeeper

West/Rhode Riverkeeper


District of Columbia

Anacostia Riverkeeper

Potomac Riverkeeper


Pennsylvania



Lower Susquehanna Riverkeeper


Virginia


Lower James Riverkeeper

Shenandoah Riverkeeper

Upper James Riverkeeper

Virginia Eastern Shorekeeper

Stormwater Runoff Pollutes the
Natural Environment

Suspended solids



Turbid waters, toxic &
excessive nutrients

Excessive sediment


Long
term ecosystem effects

Impacts of Polluted Stormwater Runoff


Polluted stormwater runoff is a leading cause of
impairment of the nearly 40% of surveyed U.S. water
bodies.


Stormwater pollution causes flooding and the
degradation of habitat for aquatic life.


In the Chesapeake Bay watershed, storm water runoff is
responsible for impairments in over 1,570 river miles and
44 square miles of estuarine waters.


Over 10,000 stream miles have been degraded by past
development, with major impacts to aquatic life in
watersheds with as little as 10% land development.


X

Drinking Water

X

Recreation

X

Wildlife Habitat

X

Fishing

Construction Sites Produce A
High Volume of Sediment


Rate of erosion
is greater per
acre on urban
construction
projects

0
50000
Sediment Volume
T/SqMi/Y
T/SqMi/Y
24
240
4,800
48,000
Forest
Grass
Crop
Const
Inadequate Staffing


Maryland regulations require that each
active site be inspected for compliance “on
the average of once every two weeks.”



MDE is only able to visit 18% of the
construction sites in areas under their
jurisdiction due to inadequate staffing.
(MDE
2007 Annual Inspection Compliance Report)


Sedimentation



the process by
which the eroded particles are
transported and deposited

Erosion

-

the process by which
land surface is worn away as
sediment is detached by the
action of wind, water, ice, or
gravity

Types of Erosion on Construction
Sites
-

Illustrated

Splash Erosion


The Process by
which sediment
particles are
detached from the
surface by the
impact of individual
raindrops.

Sheet Erosion

The removal of
surface
sediments by
water moving
across as sheet
flow.

Rill Erosion

A concentration
of sheet flow
which cuts out
small rill
channels

Gully Erosion

An extension of rill
erosion into larger
and more
established gully
channels



How Do We Fix the Problem?

Making It Happen

IDENTIFY

REPORT

EVALUATE

FOLLOW UP

PICTURES

Finding Problems

Maryland Law

Environment Article

Title 4, Water Management,
§
4
-
413


It is unlawful to add, introduce,

leak, spill, or otherwise emit soil

or sediment into waters of the

State or to place soil or sediment

in a position or location likely to

be washed into waters of the State

Making It Happen

IDENTIFY

REPORT

EVALUATE

FOLLOW UP

PICTURES





Take Lots of Pictures From
Multiple Angles

Making It Happen

IDENTIFY

REPORT

EVALUATE

FOLLOW UP

PICTURES


Making It Happen

IDENTIFY

REPORT

EVALUATE

FOLLOW UP

PICTURES

The Three Goals of This Project

1. Immediate Correction of the Problem



The Three Goals of This Project

1. Immediate Correction of the Problem


2. Taking Frequent Illegal Polluters to Court



The Three Goals of This Project

1. Immediate Correction of the Problem


2. Taking Frequent Illegal Polluters to Court


3. Fixing the System by Reforming the Law


CITIZEN ACTION WORKS!

BEFORE




AFTER



You Can Help Restore the
Chesapeake’s Waters