Economic Feasibility of Irrigated Agricultural Land Use Buffers to Reduce Groundwater Nitrate in Rural Drinking Water Sources

Agricultural irrigation leachate is often the largest source for aquifer recharge in semi-arid groundwater basins, but contamination from fertilizers and other agro-chemicals may degrade the quality of groundwater. Affected communities are frequently economically disadvantaged, and water supply...

Agriculture’s Contribution to Nitrate Contamination of Californian Groundwater (1945–2005)

Nitrogen (N) use in intensive agriculture can degrade groundwater resources. However, considerable time lags between groundwater recharge and extraction complicate source attribution and remedial responses. We construct a historic N mass balance of two agricultural regions of California to...

Managing Water Temperature TMDLs Under Economic and Environmental Uncertainty

This paper presents an empirical model for analyzing the economics of information acquisition and adaptive watershed management. An empirical application drawn from the Total Maximum Daily Load standard implemented to control in-stream water temperature pollution for the Navarro River watershed...

Mass Wasting Identification in the Navarro River Watershed Using Hyperspectral Imagery

Several of northern California's coastal watersheds have been listed by the U.S. Environmental Protection Agency as requiring the development of a Total Maximum Daily Load (TMDL) for non-point source pollution. One such case is the Navarro River watershed located in southern Mendocino County....

A Multi-Proxy Approach to Examining Land-Use Change Effects on Steelhead Trout and Coho Salmon in NW California

Historically, juvenile and spawning adult steelhead trout and coho salmon were found in abundance in the Navarro Basin of NW California. However, the numbers of juvenile steelhead and spawning adults have declined greatly over the past 100 years, while coho salmon rearing and spawning is now...

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