Adjustment of river channel capacity downstream from a reservoir
Adjustment of river channel capacity downstream from a reservoir
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DOI：
10.1029/wr010i004p00870
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发表时间：
1974-08
影响因子：
5.4
通讯作者：
K. Gregory;C. Park
中科院分区：
文献类型：
--
作者：
K. Gregory;C. Park
水库的建设可以提供一个机会，以确定大坝以下河流流量模式的变化如何导致河道容量的调整。这是在河音，萨默塞特，通过比较以上和以下的Clatworthy水库，建于1959年的通道容量的盆地进行测试。在大坝下方的许多位置，渠道横截面的形式是多重的，上部元素代表大坝施工前的满岸阶段，下部元素是当时的满岸水位。水库下游河道容量的减少持续了11 km，直到流入河流的集水面积至少是流入水库的集水面积的4倍。推导出坝下洪峰流量约为建库前洪峰流量的40%。
The construction of a reservoir may provide an opportunity to identify the way in which a changed pattern of river discharge below a dam results in an adjusted channel capacity. This is tested in the basin of the River Tone, Somerset, by comparing channel capacity above and below the Clatworthy reservoir, constructed in 1959. At a number of sites below the dam the channel cross section is multiple in form, the upper element represents the bank-full stage prior to dam construction, and the lower element is the contemporary bank-full level. The reduction of channel capacity downstream from the reservoir persists for a distance of 11 km until the catchment area contributing to the river is at least 4 times that draining to the reservoir. Peak discharge below the dam is deduced to be approximately 40% of the value that obtained prior to reservoir construction.