The effects of climate changes on aquifer storage and river baseflow
The effects of climate changes on aquifer storage and river baseflow
复制标题
气候变化对含水层储存和河流基流的影响
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
N. Arnell
中科院分区：
文献类型：
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作者：
D. Cooper;W. Wilkinson;N. Arnell
摘要利用含水层/河流系统的理想化表示，研究了气候变化对含水层蓄水和地下水流向河流的影响。广义含水层/河流模型可以纳入含水层导水率的空间变异性，适用于联合王国白垩系和三叠系砂岩含水层的参数，也适用于其他地方的其他含水层。该模型使用历史补给时间序列运行，根据观测的降雨量和潜在的蒸发数据估计补给，并根据一些气候变化情景扰动气候输入。对基流的模拟表明，在高蒸发变化的情况下，白垩岩在低流量时会有很大的比例减少。来自响应较慢的三叠系砂岩含水层的模拟基流显示出更均匀和更不严重的减少。在低蒸发量变化情景下，水文情势的变化不那么极端，但对气候变化的影响仍然很大。
Abstract The effects of changes in climate on aquifer storage and groundwater flow to rivers have been investigated using an idealized representation of the aquifer/river system. The generalized aquifer/river model can incorporate spatial variability in aquifer transmissivity and is applied with parameters characteristic of Chalk and Triassic sandstone aquifers in the United Kingdom, and is also applicable to other aquifers elsewhere. The model is run using historical time series of recharge, estimated from observed rainfall and potential evaporation data, and with climate inputs perturbed according to a number of climate change scenarios. Simulations of baseflow suggest large proportional reductions at low flows from Chalk under high evaporation change scenarios. Simulated baseflow from the slower responding Triassic sandstone aquifer shows more uniform and less severe reductions. The change in hydrological regime is less extreme for the low evaporation change scenario, but remains significant for the Ch...