Your search found 5 records
1 Gallardo, M.; Snyder, R. L.; Schulbach, K.; Jackson, L. E. 1996. Crop growth and water use model for lettuce. Journal of Irrigation and Drainage Engineering, 122(6):354-359.
Plant growth ; Vegetables ; Crop production ; Evapotranspiration ; Water use ; Irrigation requirements ; Mathematical models / USA / California / Salinas Valley
(Location: IWMI-HQ Call no: PER Record No: H019624)
2 Corwin, D. L.; Loague, K.; Ellsworth, T. R. (Eds.) 1999. Assessment of non-point source pollution in the Vadose Zone. Washington, DC, USA: American Geophysical Union. xii, 369p. (Geophysical monograph 108)
Water pollution ; Groundwater ; Water quality ; Simulation models ; Computer models ; Watersheds ; Databases ; Soil properties ; Remote sensing ; GIS ; Hydrology ; Evapotranspiration ; Soil salinity ; Irrigation effects ; Bananas / USA / Costa Rica / California / Salinas Valley / Vadose Zone
(Location: IWMI-HQ Call no: 333.91 G430 COR Record No: H024743)
3 Fogg, G. E.; LaBolle, E. M.; Weissmann, G. S. 1999. Groundwater vulnerability assessment: Hydrogeologic perspective and example from Salinas Valley, California. In Corwin, D. L.; Loague, K.; Ellsworth, T. R. (Eds.), Assessment of non-point source pollution in the Vadose Zone. Washington, DC, USA: American Geophysical Union. pp.45-61.
Groundwater ; Water pollution ; Soil properties ; GIS ; Simulation ; Aquifers ; Hydraulics / USA / California / Salinas Valley
(Location: IWMI-HQ Call no: 333.91 G430 COR Record No: H024746)
4 Sheikh, B.; Cooper, R. C.; Israel, K. E. 1999. Hygienic evaluation of reclaimed water used to irrigate food crops: A case study. Water Science and Technology, 40(4-5):261-267.
Water reuse ; Wastewater ; Recycling ; Irrigation water ; Water quality / USA / California / Monterey / Salinas Valley
(Location: IWMI-HQ Call no: P 6037 Record No: H030216)
5 Zikalala, P.; Kisekka, I.; Grismer, M. 2019. Calibration and global sensitivity analysis for a salinity model used in evaluating fields irrigated with treated wastewater in the Salinas Valley. Agriculture, 9(2):31. (Special issue: Agricultural Irrigation). [doi: https://doi.org/10.3390/agriculture9020031]
Wastewater irrigation ; Wastewater treatment ; Sensitivity analysis ; Soil salinity ; Models ; Saline water ; Irrigation water ; Moisture content ; Groundwater ; Crops ; Evapotranspiration ; Rain ; Runoff ; Fertilizers / USA / California / Salinas Valley
(Location: IWMI HQ Call no: e-copy only Record No: H049566)
(3.58 MB) (3.58 MB)
Treated wastewater irrigation began two decades ago in the Salinas Valley of California and provides a unique opportunity to evaluate the long-term effects of this strategy on soil salinization. We used data from a long-term field experiment that included application of a range of blended water salinity on vegetables, strawberries and artichoke crops using surface and pressurized irrigation systems to calibrate and validate a root zone salinity model. We first applied the method of Morris to screen model parameters that have negligible influence on the output (soil-water electrical conductivity (ECsw)), and then the variance-based method of Sobol to select parameter values and complete model calibration and validation. While model simulations successfully captured long-term trends in soil salinity, model predictions underestimated ECsw for high ECsw samples. The model prediction error for the validation case ranged from 2.6% to 39%. The degree of soil salinization due to continuous application of water with electrical conductivity (ECw) of 0.57 dS/m to 1.76 dS/m depends on multiple factors; ECw and actual crop evapotranspiration had a positive effect on ECsw, while rainfall amounts and fallow had a negative effect. A 50-year simulation indicated that soil water equilibrium (ECsw = 2dS/m, the initial ECsw) was reached after 8 to 14 years for vegetable crops irrigated with ECw of 0.95 to 1.76. Annual salt output loads for the 50-year simulation with runoff was a magnitude greater (from 305 to 1028 kg/ha/year) than that in deep percolation (up to 64 kg/ha/year). However, for all sites throughout the 50-year simulation, seasonal root zone salinity (saturated paste extract) did not exceed thresholds for salt tolerance for the selected crop rotations for the range of blended applied water salinities.
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