walker river basin project agriculture restoration and plant soil water interactions
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Walker River Basin Project Agriculture, Restoration, and Plant/Soil/Water Interactions. Tasks 4 & 5 Summary 2008. Objectives. Task 4: Cultural practices and economic potential of alternative low water use crops Biomass production Water use and water use efficiency

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walker river basin project agriculture restoration and plant soil water interactions

Walker River Basin ProjectAgriculture, Restoration, and Plant/Soil/Water Interactions

Tasks 4 & 5

Summary

2008

objectives
Objectives

Task 4:

  • Cultural practices and economic potential of alternative low water use crops
    • Biomass production
    • Water use and water use efficiency
  • Best species and methods for native habitat restoration
    • Survey species composition (native and non-native) relative to time and hydrologic changes
    • Modeling
objectives3
Impact of hydrologic and land use changes on soils

Erosivity

Salinity / salt profile

Nutrient flux / budget

Organic matter

Water table

Temperature

Impact of hydrologic and land use changes on riparian zone

Invasive species

Nutrient flux

Species composition

Objectives

Task 5:

objectives4
Objectives
  • Tasks 4 & 5:
      • Combine data collected and implement in a model
      • Apply model to determine areas most suitable for land use change.

Land Use

Change

site locations
Site Locations
  • Revegetation Only Site
  • Wildlife Management Sites
  • Well Site
site locations6
Site Locations
  • 5C Cottonwood – Vacant Lot
  • Ranch Sites
  • Valley Vista – Alfalfa Field
agricultural studies
Agricultural Studies
  • Biomass Study
    • 3 water treatments (50%, 75%, & 100%)
    • 15 vegetation types (alternative grains and potential bio-fuels)
  • Revegetation Study
    • 2 water treatments (0% & 25%)
    • 10 vegetation types (native grasses and shrubs)
site locations8
Site Locations
  • Riparian Zone:
    • One site located in Wildlife Management Area
    • Three transects perpendicular to Walker River
soil sampling
Soil Sampling
  • Agricultural Sites
    • Collected ~1300 soil samples
    • 51 Bulk Density samples
    • 51 Infiltration tests
  • Riparian Site
    • 42 soil samples
instrumentation riparian zone
Instrumentation:Riparian Zone
  • Installed 7 shallow groundwater wells
  • Cored, tested, and approved 6 bore holes for push-pull tests
instrumentation soil temperature cable
Instrumentation: Soil Temperature Cable
  • Installed (Dec 2007)
    • Valley Vista
    • Wildlife Management Well
seeding
Seeding
  • Cool season grasses and most revegetation grasses were planted Nov-Dec 2007
current analysis
Current Analysis
  • Riparian soils percent loss of organic matter due to combustion
  • C and N mineralization
  • Aggregate size fractionation
  • Soil water and exchange nutrient concentrations
  • Gas sample analysis
  • Soil textural analysis
  • Weed seed bank germination
  • Monthly water quality samples taken from the Walker River
  • Surveying of monitoring wells
coming this spring
Coming This Spring!!!
  • Seeding of remaining crops (April-May)
  • Field Instrumentation
    • Soil trace gas flux rings
    • Portable CO2 sensor chamber
    • Groundwater monitoring wells on Wildlife Management sites
    • Dust collectors & weather station at Valley Vista site
    • Evapotranspiration tents at Valley Vista site
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