Salinity of tile drainage effluent

Pillsbury, Arthur F.; Johnston, William R.; Ittihadieh, F.; Daum, Richard M.

doi:10.1029/wr001i004p00531

Cited by 16 publications

(5 citation statements)

References 2 publications

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“…• The results of this study qualitatively confirm earlier estimates by Jury [1975a, b] and Pillsbury et al [1965], that this slow displacement process results in large time requirements (on the order of decades) for saline water to be displaced and removed from the shallow groundwater system in the types of hydrologic setting represented by fields in this study.…”

Section: Discussionsupporting

confidence: 89%

“…On a smaller scale, movement of nonreactive solutes in ground water in artificially drained agricultural fields in the western San Joaquin Valley has been examined by Pillsbury et al [1965] and Jury [1975a, b]. These authors generally agreed that amounts of time on the order of several decades would be required for saline ground water to travel to drain laterals from midway between laterals, which are typically 50 to 100 m.…”

Section: Abstract 1 Introduction and Backgroundmentioning

confidence: 99%

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Processes affecting the distribution of selenium in shallow ground water of agricultural areas, western San Joaquin Valley, California

Deverel¹,

Fujii²

1987

Open-File Report

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The San Joaquin Valley Drainage Program was established in mid-1984 and is a cooperative effort of the U.S. Bureau of Reclamation, U.S. Fish and Wildlife Service, U.S. Geological Survey, California Department of Fish and Game, and California Department of Water Resources. The purposes of the Program are to investigate the problems associated with the drainage of agricultural lands in the San Joaquin Valley and to develop solutions to those problems. Consistent with these purposes, program objectives address the following key areas: (1) Public health, (2) surface-and groundwater resources, (3) agricultural productivity, and (4) fish and wildlife resources. Inquiries concerning the San Joaquin Valley Drainage Program may be directed to:

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Section: Discussionsupporting

confidence: 89%

Section: Abstract 1 Introduction and Backgroundmentioning

confidence: 99%

Processes affecting the distribution of selenium in shallow ground water of agricultural areas, western San Joaquin Valley, California

Deverel¹,

Fujii²

1987

Open-File Report

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show abstract

“…The results of this study qualitatively confirm earlier estimates by Jury [1975a, b] and Pillsbury et al [1965] that this slow displacement process results in large time requirements {on the order of decades) for saline water to be displaced and removed from the shallow groundwater system in the types cf hydrologic setting represented by fields in this study.…”

Section: Discussionsupporting

confidence: 91%

Processes affecting the distribution of selenium in shallow groundwater of agricultural areas, western San Joaquin Valley, California

Deverel¹,

Fujii²

1988

Water Resources Research

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A study was undertaken to evaluate the processes affecting the chemistry of shallow groundwater associated with agricultural drainage systems in the western San Joaquin Valley, California. The study was prompted by a need for an understanding of selenium mobility in areas having high selenium concentrations in shallow groundwater. Groundwater samples were collected along transects in three artificially drained fields where the age of the drainage system varied (15, 6, and 1.5 years). Selenium concentrations in the drain water also varied (430, 58, and 3700 t•g/L, respectively). Isot6pic enrichment and chemical composition of the groundwater samples indicate that saline-and selenium-enriched water has evolved as a result of evaporation or transpiration of groundwater. This evaporated, isotopically enriched water is being displaced by more recent, less saline irrigation water percolating through the root zone. This displacement seems to be a process whereby sodium chloride and sodium sulfate water is being replaced by more dilute calcium sulfate and calcium bicarbonate water.

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“…Saline, high-selenium groundwater is being displaced from the shallow aquifer to agricultural drainage systems by less saline water that more recently percolated past the crop root zone. The extent of this displacement is proportional to the length of time since installation of the drainage system [Pillsbury et al, 1965;Jury, 1975a, b;Deverel and Fujii, 1988;Deverel et al, 1988]. Groundwater velocities generally are low because of low hydraulic conductivities and gradients, resulting in time requirements as long as several decades for complete displacement of saline groundwater to drain laterals.…”

Section: Irrigation Of This Area With Water Imported From Northernmentioning

confidence: 99%

Groundwater Flow and Solute Movement to Drain Laterals, Western San Joaquin Valley, California: 1. Geochemical Assessment

Deverel¹,

Fio²

1991

Water Resources Research

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A study was undertaken to quantitatively evaluate the hydrologic processes affecting the chemical and isotopic composition of drain lateral water in a drained agricultural field in the western San Joaquin Valley, California. The results elucidate the process of mixing of deep and shallow groundwater (below and within 6 m from land surface) entering the drain laterals. The deep groundwater was subject to evapoconcentration prior to drainage system installation and has been displaced downward (to depths greater than 6 m) in the groundwater system. The proportions of deep and shallow groundwater entering the drain laterals was calculated from the end-member oxygen 18 compositions determined in groundwater samples. The percentage of total drain lateral flow which is deep groundwater flow is about 30% for the shallow drain lateral (1.8 m below land surface) (drain lateral I)) and 60% for the deep drain lateral (2.7 m below land surface (drain lateral 2)). During irrigation, the percentages of deep groundwater flow decrease to 0 and 30% for the shallow and deep drain laterals, respectively. Selenium concentrations in drain lateral waters decrease during irrigation but selenium loads increase. Total estimated annual loads were 1.1 and 5.4 kg of selenium for drain laterals 1 and 2, respectively. Substantial percentages of the annual load occurred during 8 days of irrigation, 23 and 9% for drain laterals 1 and 2, respectively.

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Salinity of tile drainage effluent

Cited by 16 publications

References 2 publications

Processes affecting the distribution of selenium in shallow ground water of agricultural areas, western San Joaquin Valley, California

Processes affecting the distribution of selenium in shallow ground water of agricultural areas, western San Joaquin Valley, California

Processes affecting the distribution of selenium in shallow groundwater of agricultural areas, western San Joaquin Valley, California

Groundwater Flow and Solute Movement to Drain Laterals, Western San Joaquin Valley, California: 1. Geochemical Assessment

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