Lecture12 watershed management and assessment dung 2016

Resource Management Goals • Conserve and enhance public health.. • Support watershed resource use to achieve water quality standards and soil conservation goals.. Estimation of natural

Multiple-use concept

Management of watershed resources to produce more than one product or amenity

1 Continuous use of several natural resources

2 Rotating the use of various natural

resources products

3 Geographical combination of use

Resource Management Goals

• Conserve and enhance public health

• Conserve and enhance watershed

ecosystems

• Support watershed resource use to

achieve water quality standards and soil conservation goals

• Reduce or prevent pollutant loadings

and other stressors

Regional and watershed demand

can be…

Estimation of natural resource

production

• Our knowledge for natural processes

Water cycling

Precipitation Evapo-transpiration Runoff response Water buget

Sediment movement

Soil surface erosion Mass movement

Forested land Agriculture land

Changes in resource availability

Changes in landslides

Multiple-use concept

1 Advantages for considering

interrelationships among natural and agricultural resources

2 More integrative and comprehensive land management planning

3 More sustainable approach for future development

Watershed Assessment

• A critical step in developing and

implementing a watershed management plan

• Knowing important aspect of watershed

• Evaluating how various land use can

affect the environmental and economic health of the watershed

Step 1: Develop an approach for the

assessment

Step 2: Gather information for watershed

(general information)

Step 3: Gather information identify

and evaluate problems or concerns

Step 4: Evaluate your data

Step 5: Suggest Watershed management

Watershed Assessment Process

Step 1: Develop an approach for the assessment

• Strategies for watershed management

• Desire future conditions

• Resources availability for future

• Air photo and satellite image

Step 3: Gather information identify and evaluate problems or concerns

• Forest watershed

• Agriculture watershed

• Urban Watershed

Landuse

• Past and current landuse

• Zone of landuse (upland and lowland)

• Protection area

• Road network

Water quality and quantity

Natural resources and habitat

• Forest

• Agriculture land

• Wetland

• Stream and stream corridor

• Lake and ponds

• Coastal and Shoreline

Forest

• Old growth natural forest or plantation

• Logging (clear cutting)

Agriculture

• Types of cropping

• Land preparation (Contour strip)

• Seasonal changes of cropping

• Evidence of soil loss

• Agriculture land and stream interface

Stream and stream corridor

• Forested or vegetated riparian buffer

• Types of vegetation in riparian buffer

• Bank protection work

• Sediment check dam (Sabo dam)

Point source pollutant

• Discharge from pipes

Fish and other organisms

• Physical and chemical barrier for fish and the other organisms (dams etc)

• Wildlife habitat

• Fisheries resources uses

• Fish habitat protection

Mining impacts

• Discharge of sediment from mining site

• Gravel mining on stream

• Mass movement on mining sites

Lake/Ponds and Coastal shoreline

Step 4: Evaluate your data

• Enough data?

• Enough data for defining condition of watershed?

• Enough data for identifying problem?

• Enough data for identifying area with problems?

• More study needs?

Step 5: Suggest Watershed

management

• Specific preservation and restoration goal

• Specific land use planning

• Area need to be preserved

• Specific actions for solving water and

sediment problem

The Longitudinal Profile

The Upper Course

The Middle Course

Alluvial Fan

The Lower Course

Meandering river

Sediment budget

Sediment input, output, and change for

a particular stream systems or channel reach

Single particle

Hydrologic regime and Water Quality

Channel Forms

Mass movement

cm m 10 m km 10 km 100 km Time

Tectonic activities Glacier activities

1000 YR

10000 YR

1000 km 10000 km Bedload and suspended sediment

Climate change

Importance of scaling

Adaptive Management

• What is it?

• Adaptive: recognizes change

• Learns

• Modifies to fit new situation

• In ecosystem management we need to show this type of adaptive behavior

- seek information (positive or negative)

- Reward those who bring it

- LEARN from it

Conditions

for successful Adaptive

management