HIGHLIGHTS – JAWRA AUGUST 2015
Featured Collection – Agricultural Hydrology and Water Quality:
Agriculture occupies 38% of the Earth’s land surface and is essential to providing adequate food supply for the world’s population. Decades of research have demonstrated the global agricultural footprint has a major influence on the flow, distribution, and quality of water. This featured collection examines the multifaceted ways in which agricultural influences water quality and agricultural practices can improve the quality of water draining from agricultural lands. The following are some of the articles in the collection.
Buda et al. provide an introduction to agricultural water quality issues and provide an overview of the papers in the featured collection.
Williams et al. examine the influence of riparian seepage zones on nitrate variability to two agricultural headwater streams.
Mahl et al. and Davis et al. report on the ability of two-stage ditches to reduce nitrogen, phosphorus, and sediment in agricultural streams.
Kalcic et al. present the results of interviews with farmers regarding their interest in targeting agricultural conservation practices to cost-effective locations.
McDowell et al. conduct a meta-analysis of three national databases to examine the relationships among soil, surface water, and groundwater concentrations of phosphorus.
McLellan et al. use a spatially explicit model, SPARROW, to evaluate how conservation practices may reduce nitrogen loses from row crop agriculture landscapes to streams.
Other Technical Papers:
Her et al. interpolate Shuttle Radar Topography Mission (SRTM) digital elevation model (DEM) data to provide higher resolution data for hydrologic analysis.
Li et al. calculate the surface energy budget, mass balance, and resulting melt-runoff for a glacier on the Tibetan Plateau.
Carroll et al. calibrate a basin-scale groundwater model to remotely sensed estimates of groundwater evapotranspiration.
Yun and Qian present a hierarchical model for estimating long-term trend of atrazine concentration in surface water of the contiguous United States.
Gyawali et al. examine the influence of climatic and land use factors on changes in flow of Wisconsin streams.