Stanislaus River-Introduction n River Overview – Map – Drainage Area – Precipitation – Hydrology – Land Use

Stanislaus River-Introduction (cont.) n Beneficial Uses n Non-Point Source Pollution – Junkyards – Agriculture – Suburban n Management of Non-Point Source Pollution Strategies

Stanislaus River-Map

Upper Stanislaus Drainage Area n Land Use-991 mi 2 – 0% urban – 64% forest – 7% crop n Precipitation – Average annual 47.1 inches

Lower Stanislaus River Overview n Extends from Goodwin Dam to the San Joaquin River n 59 Miles n Regulated by releases from New Melones Dam and Tulloch Reservoir

Stanislaus River Overview (cont.) n Precipitation – Average annual inches n Channel capacity – 8000 cfs

Stanislaus River-Hydrology n Typical Flows – Annual average-1288 cfs – Dry weather-1816 cfs n.34 inches – Typical wet weather-2226 cfs n 7.33 inches – Flood levels-6385 cfs n inches

Historical Stream Flow

Lower Stanislaus River- Estimated Land Use

Stanislaus River-Estimated Land Use (cont.) n Area Estimation – Scanned in quad maps – Scanned in AAA maps – Delineated 3 mile sections of the river – Added up area n Crossed reference with land use information for Middle San Joaquin-Lower Merced- Lower Stanislaus Watershed

Beneficial Uses n Recreation – Rafting – Swimming – Fishing n Fish Habitat – Trout – Steel Head – Salmon – Planting

Beneficial Uses (cont.) n Irrigation Water – Local water districts n Drinking Water – Local communities

Non-Point Source Pollution n Junkyards n Agriculture – Crops/field – Livestock n Suburban – Housing n Illegal dumping

Non-Point Source-Junkyards n Several vehicles underwater n Engine parts n Drums/tires

Non-Point Source-Junkyards (cont.) n Oil/Gas/Grease n Solids n Erosion around vehicles

Non-Point Source-Agriculture n Crops – Pesticides – Erosion – Biomass n Livestock – Manure – Erosion – Excess feed

Non-Point Source-Agriculture Example: Vineyard n Plowed Area on side of hill – Several hundred acres – Rain – Runoff across street into river

Non-Point Source-Agriculture Example: Donkey Farm

Non-Point Source-Donkey Farm (cont.) n Effects – Vegetation loss leading to increased erosion – Manure leads to increased nutrients n nitrogen n phosphorus – Stimulates plant growth

Non-Point Source-Suburban n Trailers and mobile homes line river – commonly inundated

Non-Point Source-Suburban (cont.) n Homes also line river within flowage easement – again, area surrounding house commonly inundated

Non-Point Source-Suburban (cont.) n Effects – Household trash in flow area – Overflow onto lawns n pesticides/fertilizers/grass clipping

Non-Point Source Pollution- Management Strategies n Agriculture n Junkyards n Suburban-household debris

Management of Non-Point Source-Agriculture n Depending on size, require small detention basin n Manure collection n Ensure feed is placed in feed bins to limit runoff n Requirements for animals per acre

Management of Non-Point Source-Junkyards n Require areas to be out of flow stream n Require removal of POLs’ from vehicles prior to storage

Management of Non-Point Source-Suburban n Require houses/mobile homes/trailers to be built out of the flow stream n Restrict storage of household debris within flow stream n Restrict vegetation clearing within flow stream

Conclusion n Non-Point Sources – Junkyards/agriculture/suburban n Possible Management Strategies – Removal of material from high flow areas – Steps to reduce runoff from agriculture areas n Numerous Small Sources – Series of BMPs for all