Use of a simple surface–groundwater interaction model to inform water management
Use of a simple surface–groundwater interaction model to inform water management
复制标题
使用简单的地表水-地下水相互作用模型为水管理提供信息
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
B. Croke
中科院分区：
文献类型：
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作者：
K. M. Ivkovic;R. Letcher;B. Croke
在澳大利亚和世界许多其他地区，河流和地下水的分配传统上是分开管理的，尽管在许多地区，地下水和河流系统在水力上是相连的。在河流系统在水力上相连的地区抽取地下水，可能对河流流量，特别是基流或低流量造成重大影响，而基流或低流量被认为具有重要的生态意义。传统的地下水建模方法往往是在数周或数月的时间尺度上进行的，不足以证明地下水抽取对许多河流系统的影响，特别是在水流短暂的情况下。地下水开采对地表水流的影响被认为是使用一个简单的，概念性的，集总参数建模方法称为IHACRES_GW。考克斯河流域的Namoi河流域，新南威尔士州被用作一个案例研究。抽取地下水对这一地区的基流产生重大影响，目前的政策无法有效减少这些影响。这些研究结果表明，这种建模方法的潜力，与传统的地下水模型结合使用时，在设定分配限制，以评估对河流流量的影响。
Allocations of river and groundwater have been traditionally managed separately in Australia and many other parts of the world even though in many regions groundwater and river systems are hydraulically connected. Groundwater extractions in areas where river systems are hydraulically connected can cause substantial impacts to river flows particularly base flows or low flows, which are considered to be ecologically important. Traditional groundwater modelling approaches tend to be undertaken on time-scales of weeks or months and are not sufficient to demonstrate the impacts of groundwater extractions in many river systems, particularly where flows are ephemeral. The impacts of groundwater extraction on surface water flows is considered using a simple, conceptual, lumped-parameter modelling approach called IHACRES_GW. The Coxs Creek catchment in the Namoi River Basin, New South Wales is used as a case study. Groundwater extractions are having significant impacts on base flows in this area and current policies will not be effective in reducing these impacts. These findings demonstrate the potential of such a modelling approach, when used in conjunction with traditional groundwater models, in setting allocation limits to assess impacts on river flows.