干旱区生态环境知识资源中心(Arid): Duration and Frequency of Ponded Water on Arid Southwestern Playas.

Arid

报告编号	ADA406732
	Duration and Frequency of Ponded Water on Arid Southwestern Playas.
	Lichvar, R; Gustina, G; Bolus, R.
英文摘要	Playas, ’The flat-floored bottom of an undrained desert basin that becomes at times a shallow lake which on evaporation may leave a deposit of salt or gypsum,’1 are regulated by the U.S. Army Corps of Engineers (Corps) under the provisions of the Code of Federal Regulations 33 CFR 328.3 A implementing Section 404 of the Clean Water Act (CWA). The Corps and others perform jurisdictional delineations of playas to determine whether certain areas are subject to Section 404 regulations. However, delineating playas has been found to be problematic (e.g., Doug and Colberg 1996; Lichvar and Sprecher 1996; Brostoff, Lichvar, and Sprecher 2001). Case studies have been performed for several playas in the western Mojave Desert, California, to examine surface hydrology. The purpose of this study was to estimate the duration and frequency of inundation at these playas.
英文关键词	Water Playas Hydrology Geology Army corps of engineers Wetlands Basins(Geographic) Shallow depth
出版年	2002
语种	英语
国家	United States
URL	http://r.cnki.net/KCMS/detail/detail.aspx?DbCode=KJBG&dbname=KJBGW&filename=59fac32d31c97d1d549b1c5a
来源机构	Non Paid ADAS
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/273051
推荐引用方式 GB/T 7714	Lichvar, R,Gustina, G,Bolus, R.. Duration and Frequency of Ponded Water on Arid Southwestern Playas.,2002.