干旱区生态环境知识资源中心(Arid): Natural Recharge to the Unconfined Aquifer System on the Hanford Site from the Greater Cold Creek Watershed: Progress Report 2004

Arid

DOI	10.2172/15020929
报告编号	PNNL-14717
来源ID	OSTI_ID: 15020929
	Natural Recharge to the Unconfined Aquifer System on the Hanford Site from the Greater Cold Creek Watershed: Progress Report 2004
	Waichler, Scott R.; Wigmosta, Mark S.; Coleman, Andre M.
英文摘要	Movement of contaminants in groundwater at the Hanford Site is heavily dependent on recharge to the unconfined aquifer. As the effects of past artificial discharges dissipate, the water table is expected to return to more natural conditions, and natural recharge will become the driving force when evaluating future groundwater flow conditions and related contaminant transport. Previous work on the relationship of natural recharge to groundwater movement at the Hanford Site has focused on direct recharge from infiltrating rainfall and snowmelt within the area represented by the Sitewide Groundwater Model (SGM) domain. However, part of the groundwater recharge at Hanford is provided by flow from Greater Cold Creek watershed (GCC), a large drainage area on the western boundary of the Hanford Site that includes Cold Creek Valley, Dry Creek Valley, and the Hanford side of Rattlesnake Mountain. This study was undertaken to estimate the recharge from GCC, which is believed to enter the unconfined aquifer as both infiltrating streamflow and shallow subsurface flow. To estimate recharge, the Distributed Hydrology-Soil-Vegetation Model (DHSVM) was used to simulate a detailed water balance of GCC from 1956 to 2001 at a spatial resolution of 200~m and a temporal resolution of one hour. For estimating natural recharge to Hanford from watersheds along its western and southwestern boundaries, the most important aspects that need to be considered are 1)~distribution and relative magnitude of precipitation and evapotranspiration over the watershed, 2)~streamflow generation at upper elevations and infiltration at lower elevations during rare runoff events, and 3)~permeability of the basalt bedrock surface underlying the soil mantle.
出版年	2004
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 ; AQUIFERS ; BASALT ; DISTRIBUTION ; DRAINAGE ; GROUNDWATER RECHARGE ; PERMEABILITY ; PRECIPITATION ; RESOLUTION ; RUNOFF ; SOILS ; SPATIAL RESOLUTION ; STREAMS ; TRANSPORT ; WATER TABLES ; WATERSHEDS recharge ; DHSVM ; Cold Creek ; Dry Creek ; Rattlesnake Mountain ; watershed modeling
URL	http://www.osti.gov/scitech/servlets/purl/15020929
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/268790
推荐引用方式 GB/T 7714	Waichler, Scott R.,Wigmosta, Mark S.,Coleman, Andre M.. Natural Recharge to the Unconfined Aquifer System on the Hanford Site from the Greater Cold Creek Watershed: Progress Report 2004,2004.