Remote sensing is a viable tool for mapping soil salinity in agricultural lands

California Agriculture

卷:71

Dennis L. Corwin¹  Elia Scudiero²  Kevin Yemoto³  Ray G. Anderson⁴  Todd H. Skaggs⁵  Wesley Clary⁶  Zhi “Luke” Wang⁷ 

[1] D.L. Corwin is Research Soil Scientist at the United States Salinity Laboratory (USDA-ARS) in Riverside;

[2] E. Scudiero is Postdoctoral Research Fellow in the Department of Environmental Sciences at UC Riverside and at the United States Salinity Laboratory (USDA-ARS) in Riverside;

[3] K. Yemoto was Physical Science Technician at the United States Salinity Laboratory (USDA-ARS) in Riverside and currently is at the Water Management and Systems Research Unit (USDA-ARS) in Fort Collins, CO;

[4] R.G. Anderson is Research Soil Scientist at the United States Salinity Laboratory (USDA-ARS) in Riverside;

[5] T.H. Skaggs is Research Soil Scientist at the United States Salinity Laboratory (USDA-ARS) in Riverside.;

[6] W. Clary was Physical Science Technician at the United States Salinity Laboratory (USDA-ARS) in Riverside and currently is at University of New Mexico in Albuquerque, NM;

[7] Z.L. Wang is Professor of Hydrology and Soil Physics in the Department of Earth and Environmental Sciences at California State University, Fresno;

关键词: agricultural land;    cartography;    Farms and Farming Systems;    Natural Resources;    remote sensing;    Research, Technology and Engineering;    soil salinity;    soil science;   

DOI  :  10.3733/ca.2017a0009

来源: DOAJ

【 摘 要 】

Soil salinity negatively impacts the productivity and profitability of western San Joaquin Valley (WSJV) farmland. Many factors, including drought, climate change, reduced water allocations, and land-use changes could worsen salinity conditions there, and in other agricultural lands in the state. Mapping soil salinity at regional and state levels is essential for identifying drivers and trends in agricultural soil salinity, and for developing mitigation strategies, but traditional soil sampling for salinity does not allow for accurate large-scale mapping. We tested remote-sensing modeling to map root zone soil salinity for farmland in the WSJV. According to our map, 0.78 million acres are salt affected (i.e., ECe > 4 dS/m), which represents 45% of the mapped farmland; 30% of that acreage is strongly or extremely saline. Independent validations of the remote-sensing estimations indicated acceptable to excellent correspondences, except in areas of low salinity and high soil heterogeneity. Remote sensing is a viable tool for helping landowners make decisions about land use and also for helping water districts and state agencies develop salinity mitigation strategies.

【 授权许可】

Unknown