A soil-drainage study in southwestern Fresno County
AuthorsW. C. Bianchi
E. E. Haskell
William R. Johnston
Authors AffiliationsW. C. Bianchi was Research Soil Scientist, United States Department of Agriculture, ARS, Soil and Water Conservation Research Division, Southwest Branch, Fresno; E. E. Haskell was Geologist, United States Department of Agriculture, ARS, Soil and Water Conservation Research Division, Southwest Branch, Fresno; William R. Johnston was Assistant Specialist in Irrigation and Soil Science, Los Angeles.
Hilgardia 33(5):171-178. DOI:10.3733/hilg.v33n05p171. November 1962.
This study describes the conditions associated with a developing drainage problem in southwestern Fresno County, where irrigation water is to be furnished from the joint state and federal San Luis Project.
In a 7½-square-mile study area southeast of the town of Cantua Creek, where no drainage problem has been suspected until recently, a semiperched water table has risen into the crop-root zone. This water is perched on an extensive layer of heavy-textured sediments 100 feet below ground surface. The thickness and limited permeability of this layer have resulted in the accumulation of considerable depths of perched water. The perched water in the study area is part of a groundwater ridge that extends at least 10 miles south of that area and is maintained by deep percolation from irrigation, even though irrigation has been greatly limited by dwindling groundwater supplies. The soluble-salt content of this water has built up the salinity of the surface soils where the water table has risen into the root zone.
Scattered stratigraphic and water-table observations indicate that similar drainage problems could develop over a broad area of southwestern Fresno County when irrigation is intensified with imported water.
Davis G. H., Green J. H., Olmsted F. H., Brown D. W. Ground-water conditions and storage capacity in the San Joaquin Valley, California. 1957. California: U. S. Geol. Survey, Ground Water Branch, Open-file Rpt. Sacramento. 559p.
Davis G. H., Poland J. F. Ground-water conditions in the Mendota-Huron area Fresno and Kings counties, California. U. S. Geol. Survey Water-Supply Paper. 1957. 1360-G:409-588.
Harradine Frank F. Soils of western Fresno County, California 1950. p.86. California Agr. Expt. Sta., Div. Soils [Folio 7]
Johnston William R., Pillsbury Arthur F. Drainage performance and waste water management in the San Joaquin Valley of California. 1960-61 Progress Report. 1961. Los Angeles: Dept. Irrig. and Soil Sci., Univ. California. (Mimeographed.)
Pillsbury A. F., Christiansen J. E. Installing ground-water piezometers by jetting for drainage investigations. Agr. Engin. 1947. 28:409-10.
Also in this issue:U.C.'s forestry research has great influence
Understanding our forest resources through research
California forests: A multiple resource
Clonal selection of forest trees
The fertility of the forest
Tree physiology as a basis for better silviculture
Root growth capacity: One key to bare-root seedling survival
Optimum initial stocking density in ponderosa pine plantations
Economic importance of forest industries in northern California
A new approach to uneven-aged silviculture and management of mixed conifer-oak forests
Livestock grazing in national forests
Forest fuel management
Extension: Applying research findings
Urban forest structure: A key to urban forest planning
The impact of people on mountain wilderness lakes
Evaluation of sparse Douglas-fir tussock moth populations
in California forests
Remote sensing: An aid to managing forest resources
Forest products laboratory
Decay of wood in structures