The presentation explains the challenges for urban watershed management.

1. URBAN WATERSHED
MANAGEMENT
PREETI JACOB
ASST. PROFESSOR,
DEPARTMENT OF CIVIL ENGINEERING
IIC VICE PRESIDENT
CMR INSTITUTE OF TECHNOLOGY, BANGALORE

2. CONTENTS
 Introduction
 Comparison of hydrograph
 Challenges of Urban Watershed
 Requirement of Watershed Management
 Steps in Urban Watershed Management
 Building Local Partnership
 Priorities for action
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3. WATERSHED
 A watershed is an
area of land that
drains water into a
specific
waterbody. The
waterbody can be
a lake, stream,
river etc. Other
names river basin,
catchment etc.
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5. WATERSHED MANAGEMENT
 Watershed management describes the process of
implementing land use practices and water
management practices to protect and improve the
quality of the water and other natural resources
within a watershed by managing the use of those
land and water resources in a comprehensive
manner.
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6. PART OF VARTHUR WATERSHED – 2001
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PART OF VARTHUR WATERSHED – 2021

8. HYDROGRAPH COMPARING PRE AND POST
DEVELOPMENT
 Increase in peak discharge
 Reduction in time to peak
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9. CHALLENGES OF URBAN WATERSHED
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 Impervious surface
area
 Presence of industrial
and commercial area
 Changes in the terrain
of the area
 High density population
 Variations in rainfall
 Urban Heat Island
Effect – Convective
Rainfall
Direct factor Indirect factors

10. URBAN WATERSHED MANAGEMENT
PLANNING
Watershed management planning is a process that
results in a plan or a blueprint of how to best
protect and improve the water quality and other
natural resources in a watershed.
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11. REQUIREMENT OF WATERSHED
MANAGEMENT
 Runoff carrying pollutants can pollute the water
bodies like rivers and lakes – identification of
source of pollution and its transport.
 All activities in the watershed directly or indirectly
effect the water quality. New land development,
runoff from already-developed areas,
agricultural activities, and household activities
such as gardening/lawn care, septic system
use/maintenance, water diversion and car
maintenance all can affect the quality of the
resources within a watershed.
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12. REQUIREMENT OF WATERSHED
MANAGEMENT
 Watershed boundaries do not coincide with political
boundaries, the actions of adjacent municipalities
upstream can have as much of an impact on the
downstream municipality’s land and water
resources as those actions carried out locally.
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14. STEPS IN URBAN WATERSHED
MANAGEMENT
1. Delineate the watershed
boundary.
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15. STEPS IN URBAN WATERSHED
MANAGEMENT
2. Inventory and map the
resources in the watershed.
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16. STEPS IN URBAN WATERSHED
MANAGEMENT
3. Inventory and map the
natural and man made
drainage system.
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17. STEPS IN URBAN WATERSHED
MANAGEMENT
4. Inventory and map land
use and land cover.
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18. STEPS IN URBAN WATERSHED
MANAGEMENT
5. Inventory and map the soil.
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19. STEPS IN URBAN WATERSHED
MANAGEMENT
6. Identify areas of erosion,
including stream banks and
construction sites.
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20. STEPS IN URBAN WATERSHED
MANAGEMENT
7. Identify the quality of water
resources in the watershed as a
baseline.
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21. STEPS IN URBAN WATERSHED
MANAGEMENT
8. Inventory and map point
and non-point source of
pollution
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22. BUILDING LOCAL PARTNERSHIP
Local partnerships can include:
 Residents;
 Landowners;
 Country, state, and municipal government officials;
 Watershed associations and other environmental
and civic groups;
 Local business and industry leaders;
 Agricultural users;
 Developers;
 Teachers; and
 Recreational users.
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23. PRIORITIES FOR ACTION
Watershed management planning should determine
what the opportunities are
 to reduce pollution or address other pressing
environmental issues,
 prioritize those opportunities, and
 identify a time frame for accomplishing pollution
reduction and resource and habitat improvements.
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24. PRIORITIES FOR ACTION
 Those issues that pose the greatest risk to human
health or particular resources, or to desired uses of
resources should be given highest priority for
control and reduction. Watershed plans should
establish clear goals, visions, and actions to be
taken.
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25. EXAMPLES
 Infrastructure improvements
 Reducing paved areas and other impervious cover
 Identifying appropriate areas for open space
acquisition
 Increasing inspections and maintenance of existing
septic system and encouraging repairs to failing
systems
 Identifying and evaluating opportunities for
nonstructural flood protection efforts
 Improving waste management, pollution prevention,
and recycling efforts at municipal facilities and
businesses within the watershed.
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26. CONCLUSION
 A general overview of urban watershed
management and its steps to implement it.
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27. THANK YOU.....
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