slide1 l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Sedimentology, Resource Conservation Methods and Environmental Policy of Irrigated Row Crop Agriculture in the Salinas V PowerPoint Presentation
Download Presentation
Sedimentology, Resource Conservation Methods and Environmental Policy of Irrigated Row Crop Agriculture in the Salinas V

Loading in 2 Seconds...

play fullscreen
1 / 11

Sedimentology, Resource Conservation Methods and Environmental Policy of Irrigated Row Crop Agriculture in the Salinas V - PowerPoint PPT Presentation


  • 148 Views
  • Uploaded on

Sedimentology, Resource Conservation Methods and Environmental Policy of Irrigated Row Crop Agriculture in the Salinas Valley, CA. Don Kozlowski May 2001. Background. 1972, Clean Water Act, Sect. 303(d) list & fix pollution via TMDL Salinas River listed as impacted by sediment

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Sedimentology, Resource Conservation Methods and Environmental Policy of Irrigated Row Crop Agriculture in the Salinas V' - alma


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Sedimentology, Resource Conservation Methods and Environmental Policy of Irrigated Row Crop Agriculture in the Salinas Valley, CA

Don Kozlowski

May 2001

background
Background
  • 1972, Clean Water Act, Sect. 303(d)
  • list & fix pollution via TMDL
  • Salinas River listed as impacted by
  • sediment
  • Beneficial uses & the Endangered
  • Species Act
  • 2001, still no TMDL for the Salinas
  • Salinas Sediment Study hired by
  • state for technical assistance
possible sources
Possible Sources
  • Natural processes
  • Recreational use
  • Mining
  • Urban/suburban
  • Grazing
  • Viticulture
          • Agriculture
  • 15% of area is row crop agriculture (165,000 ha)
  • 40% sediment of U.S. rivers from cultivated land
  • ag’s contribution to the Salinas River?
objectives
Objectives

Determine:

  • Typical sediment yields from row crop ag fieldsdue to irrigation and storm events during a season
  • Efficiency of a particular best management practice, the water/sediment detention basin
methods
Methods

Site selection

Catchment construction

Filtration

Recording and analysis

methods cont
Methods (cont’)
  • Create model that predicts field erosion
    • Determined from various event parameters
  • Upscale the field data to watershed scale
    • GIS model to get area & slope
    • Rainfall model
  • For detention basins
    • Compare sediment into basin to sediment out
results cont
Results (cont’)

Erosion Model:

still more results
Watershed Scale Erosion Estimates:

Rainfall: 93 kilo-tonnes, 1.2 tonnes/ha

Irrigation: 141 kilo-tonnes, 1.7 tonnes/ha

Total: 234 kilo-tonnes, 2.9 tonnes/ha

60% of agricultural row cropland, slopes <2.3%

Only a fraction of this made it to the Salinas River

Still More Results

CAUTION!!

  • Efficiency of Detention Basin
    • 100% for sand, at least 99% for silt/clay
    • 211mg/L max outgoing; 46,400 mg/L max incoming
discussion wrap up
Discussion/Wrap-up
  • Agricultural land use produces a lot of erosion
  • Many BMP’s are in place
  • Detention basins appear to work well
  • Improvements:
    • Storm erosion dynamics, need more data
    • Slopes > 2%, need data
    • Rain model
acknowledgements
Acknowledgements
  • Farmers
  • SSS team (Thor, Wendi, Adrian, Alana, Bronwyn, Joel, Julie)
  • Mark Angelo, RWQCB
  • Bryan Largay, Monterey Co. RCD
  • NASA/EPA
  • Dr. Sharon Anderson
  • Dr. Lars Pierce
  • Dr. Fred Watson