Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.2172/95361 |
| 报告编号 | UCRL-ID--120326 |
| 来源ID | OSTI_ID: 95361 |
| Final report on the Groundwater Isotope Project in the Brentwood Region of East Contra Costa County, California | |
| Davisson, M.L. [Lawrence Livermore National Lab., CA (United States)]; Campbell, K.R. [Univ. of California, Davis, CA (United States). Dept. of Geology] | |
| 英文摘要 | Groundwater in the Brentwood region has been characterized using isotope hydrology techniques and have addressed resource issues regarding the future sustainability of groundwater, maintenance of existing supplies, and exploration of new supplies. The stable isotopes of oxygen and hydrogen indicate that groundwater is derived from two sources: ancient rain recharge, and recharge of agricultural irrigation water. Rain derived groundwater ages range from <1000 to {approximately}12,000 years old. Agricultural recharge groundwater is <80 years and has recharged much of the basin on average to {approximately}125 fbs. The agricultural water recharges >10 times faster than natural rain water and hence, represents the principal recharge component. The agricultural recharge at the present time provides groundwater quantities to the basin that exceed the yearly water supply demand. With increasing urban development and retiring agricultural land, the availability of groundwater will decrease. Safe yield projections for the groundwater have been modeled to show that safe groundwater yields range between 30 to 120 acre-ft/mi{sup 2} per year for a population of 70,000 people. This will only account for {approximately}3 to 11 % of the total water demand. Furthermore, much of this groundwater may need well head treatment for water quality problems. |
| 出版年 | 1995 |
| 报告类型 | Technical Report |
| 语种 | 英语 |
| 国家 | 美国 |
| 来源学科分类 | 54 ENVIRONMENTAL SCIENCES ; 58 GEOSCIENCES ; URBAN AREAS ; WATER SUPPLY ; WATER QUALITY ; PROGRESS REPORT ; GROUND WATER ; TRACER TECHNIQUES ; HYDROLOGY ; GROUNDWATER RECHARGE ; COMPILED DATA |
| URL | http://www.osti.gov/scitech/servlets/purl/95361 |
| 资源类型 | 科技报告 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/266131 |
| 推荐引用方式 GB/T 7714 | Davisson, M.L. [Lawrence Livermore National Lab., CA ,Campbell, K.R. [Univ. of California, Davis, CA . Final report on the Groundwater Isotope Project in the Brentwood Region of East Contra Costa County, California,1995. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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