富士地区熔岩流的水文地质特征

Toshio Murashita
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引用次数: 0

摘要

许多含水层在水文地质学上被分为土壤和岩石两类。裂隙岩石的孔隙度和渗透率均大于土体。在裂隙岩的透水带,地下水极易流动,降雨时水位迅速上升。富士地区具有冷却节理、裂缝、管状、泡状等特征的熔岩流透过率最高。根据熔岩流井的观测资料,水位的周期性波动反映了季节性降雨的补给。自1960年以来,严重的盐水侵入熔岩流是该地区透支的结果。地下水资源的管理始于1967年,抽水调节的净效应是几年后区域水位的迅速上升和咸水污染熔岩流中的淡水的恢复。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Hydrogeologic Features of Lava-Flows in Fuji Region
Many aquifers are hydrogeologically classified as two types of soil and rock.
The pore and permeability of fractured rocks are larger than those of soil. In permeable zones of fractured rock, ground water is very easy to flow, and water level rises rapidly under rainfall.
The lava-flows in Fuji region with cooling joints, fractures, tubes, vesicles have the highest transmissivity. According to the observation data of wells in the lava-flows, the cyclic fluctuations of the water level reflect recharge from seasonal rainfall. The serious salt-water intrusion into the lava-flows since 1960 occurred as the result of overdraft in the region.
The management of ground-water resources was started in 1967, and the net effect of the regulation of pumping is the rapid rising of the regional water level and the recovery of fresh water in the salt-water contaminated lava-flows after several years.
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