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Mocho Subbasin : ウィキペディア英語版 | Mocho Subbasin
The Mocho Subbasin is the largest of the groundwater subbasins in the Livermore Valley watershed in Northern California. This subbasin is bounded to the west by the Livermore Fault Zone and to the east by the Tesla Fault. Some groundwater flow occurs across these fault boundaries, but flows are discontinuous below a depth of fifty feet across the Tesla Fault and south of the Arroyo Mocho channel across the Livermore Fault.〔''Environmental Screening Analysis, 2127 Railroad Avenue, Livermore, California'', Earth Metrics rpt no. 7785, San Mateo, Ca., Feb., 1989〕 Surface watercourses in this unit include Arroyo del Valle and Arroyo Seco. ==Aquifer details== To the north, the Tiago Macheira Subbasin contacts the Tassajara Formation, with which no groundwater exchange occurs. Groundwater flow in the subbasin is generally from southeast toward the northwest or north, corresponding to the slope of the regional terrain and water table surface. Uncontained shallow groundwater occurs within of the surface, while deeper confined water has levels that occur at various depths from to below the surface.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Mocho Subbasin」の詳細全文を読む
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