bear river cathy lee ce 296 b spring 1998 assignment #4
TRANSCRIPT
Bear River
Cathy Lee
CE 296 B
Spring 1998
Assignment #4
Bear River
• Introduction
• Watershed Information
• Beneficial Uses
• Point Source Pollution
• Non-Point Source Pollution
• Management of Non-Point Source Pollution
Bear River Introduction
• Approximately 80 miles long.
• From Tahoe National Forest to Feather River in Yuba County
• Watershed Overview
• Watershed Ranking
• Hydrology
• Land Uses
Bear RiverWatershed Information
Bear RiverWatershed Information
• Two Basins
- Upper Bear River Watershed (369.93 mi2)
Bear River
Little Clipper Creek
Little Wolf Creek
- Lower Bear River Watershed (105.5. mi2)
Bear River
Bear River Watershed Information
Watershed Ranking
• 1997 California Rivers Assessment:
Functioning - at risk
Hydrology
• Average annual flow: 400 cfs
• Dry Weather Flow Rate : 11 cfs
• Wet Weather Flow Rate: 1080 cfs
• Min. Dry Weather: 0 cfs (1977)
• Max. Wet Weather: 48,000 cfs (1986)
Bear River Watershed Information
Bear RiverWatershed Information
Water Diversion
Land Use - Upper Bear
Bear River Watershed Information
Land Use(EPA)
Land Use(Observation)
Crop Use 0% 30%
Urban /Suburban
0% 14%
Forest 56% 56%
Total 56% 100%
Land Use - Lower Bear
Bear River Watershed Information
Land Use(EPA)
Land Use(Observation)
Crop Use 58% 90%
Urban /Suburban
0% 5%
Forest 5% 5%
Total 63% 100%
• Industrial - Power Generation**• Agricultural Water Supply**
• Recreation - Contact and Non-Contact*
• Municipal Water Supply
• Fish Habitat, Migration, and Spawning
• Wildlife Habitat
Bear River Beneficial Uses
• Power Generation
Upper Bear River Watershed Only
11 Hydroelectric Power Facilities
581.71 gigawatt hours / year
Bear RiverBeneficial Uses
Bear RiverBeneficial Uses
Bear RiverBeneficial Uses
• Recreation
Upper Bear River Watershed
Swimming
Fishing
Shoreline Activities
• Agricultural Irrigation
Lower Bear River Watershed
Both crops and livestock
17.66 mgd = 27.5 cfs
(Average)
Bear RiverBeneficial Uses
Bear RiverPoint Source Pollution
2 Major Point Source Discharges
City of Grass Valley
Beale Air Force BaseNot Directly into the River
Sources
• Agriculture– Fertilizer Use
– Pesticide Application
– Animal Waste
– Sedimentation / Erosion
Bear RiverNon-point Source Pollution
Example-
Storm water carrying trash and debris entering the River
Bear RiverNon-point Source Pollution
• Reduce Agricultural Runoff
– Apply fertilizer and pesticides at the proper
agronomic rates
– Timing of application
– Use of filter media, i.e. grass, to absorb extra
fertilizers, pesticides, and water between
orchard rows
Bear RiverManagement Strategies
Bear RiverManagement Strategies
• Public Education– Proper use of fertilizers and pesticide
• Implement BMPs– Land use : Crop rotation
Minimum distance between the
River and farm
– Livestock manure control
– Fertilizer and pesticide sales