Meeting today's food production demand in the 21st century in the United States will depend on ground-water. U.S. agriculture uses 49.5 billion gallons of groundwater per day, on average, for irrigation-65% of the nation's daily total of 76 billion gallons. Sustaining the nation's ground...
The High Plains, Mississippi Embayment, and Central Valley aquifer systems within the United States are currently being overexploited for irrigation water supplies. The unsustainable use of groundwater resources in all three aquifer systems intensified from 2000 to 2008, making it imperative that we ...
although nitrates typically derived from fertilizer exceeded federal standards in 5 percent of the wells sampled, the agency said.rnThe report, Factors Affecting Water Quality in Selected Carbonate Aquifers in the United States, 1993-2005, is part of a series of studies under the USGS National Wat...
Conceptual understanding and groundwater quality of selected basin-fill aquifers in the Southwestern United States The National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey has been conducting a regional analysis of water quality in the princip... SA Thiros,LM Bexfield,DW...
The Edwards Plateau is one of the largest continuous karst regions of the United States; yet, its geomorphic evolution has previously received little syste... EHJ Kastning 被引量: 24发表: 1983年 Preliminary delineation and description of the regional aquifers of Tennessee : Cumberland Plateau aqui...
Programs; (United States) 被引量: 11发表: 1985年 Dating and correlating potential aquifers for geothermal energy, CO2, and energy storage, within the late Triassic–early Cretaceous succession in the Swedish Page 1. Lindström, Erlström 2007 1 Dating and correlating potential aquifers for ...
Distribution of karst aquifers within the United States and its territories based on USGS data is presented herein (Fig. 2). Detailed geological investigations in Puerto Rico show that limestone, dolomite, gypsum and anhydrite are the most common materials forming Puerto Rican karst aquifers (Fig. ...
I) About 27 percent of the irrigated land in the United States overlies the aquifer, which yields about 30 percent of the ground water used for irrigation in the United States. J) Since 1950, agricultural irrigation has reduced the saturated volume of the aquifer by an estimated 9%. Depleti...
combatants through a programme run by the United Nations Development Programme (UNDP) until fundsweredepletedlatein 2010. daccess-ods.un.org daccess-ods.un.org 结果,联刚稳定团通过联合国开发计划署(开发署)经办的一个方案开 始遣散数以百计的战斗人员,直至 2010 年底资金用尽。
或者,您可以通过以下选项直接从 ProQuest 购买本文档完整全文文献的副本: 订购 Vulnerability of shallow aquifers of the conterminous United States to nitrate: Assessment of methodologies Kumarasamy, Karthik. Utah State University ProQuest Dissertations & Theses, 2008. 1456941. ...