
Analysis on the Calculation Method of Groundwater Sustainable Yield in Hilly Areas based on Ecological Flows
Zheng-min XU, Zhong-tian JIN, Shi-nan TANG, Zha-rong PAN
Analysis on the Calculation Method of Groundwater Sustainable Yield in Hilly Areas based on Ecological Flows
The sustainable yield of groundwater is usually referred as the maximum threshold of groundwater exploitation and utilization at regional level, and it is an important control indicator for groundwater governance and protection. With the goal of maintaining the stability of the groundwater drainage structure in the hilly area, a method for calculating the recoverable amount of groundwater in the hilly area based on the natural base-diameter ratio—base-diameter ratio relationship curve method is proposed; to ensure the water demand of the ecological environment in the river course, A method for calculating the recoverable amount of groundwater in the hilly area, which takes the degree of water resources development and utilization as the control index, is proposed—the control method of the available surface water. It takes Chifeng City as an example, the sustainable yield of ground water in hilly areas is 407 million m3. The result matches the actual situation in Chifeng City therefore proving the calculation is rational. The yield in Chifeng City can promote the acceptable exploitation and sustainable use of groundwater, and maintain ecological security in that region. It can also be taken as a research reference for calculating sustainable yield of groundwater in hilly areas in China.
hilly areas / sustainable yield of groundwater / Base Flow-Runoff Ratio Curve / Available Surface Water Control Method {{custom_keyword}} /
Fig.2 Base Flow-Runoff Ratio Curve of the nested water resources three-level area in Chifeng City图2 赤峰市嵌套各水资源三级区基径比关系曲线 |
Tab.1 Calculation results of Base Flow-Runoff Ratio Curve表1 基径比关系曲线法计算结果 (亿m3) |
水资源三级区 | 2001-2016年多年平均 | |||||
---|---|---|---|---|---|---|
天然 径流量 | 天然河川 基流量 | 实际 开采量 | 开采 净消耗量 | 不合理 开采量 | 可开采量 | |
合计 | 14.59 | 1.55 | 9.69 | 7.77 | 5.62 | 4.07 |
西拉木伦河及老哈河 | 10.54 | 0.93 | 7.79 | 6.26 | 4.31 | 3.48 |
乌力吉木仁河 | 1.86 | 0.14 | 1.25 | 1.10 | 1.10 | 0.15 |
西辽河下游区间(苏家堡以下) | 0.62 | 0.06 | 0.39 | 0.36 | 0.20 | 0.19 |
沿渤海西部诸河 | 0.49 | 0.12 | 0.22 | - | - | 0.22 |
滦河山区 | 0.25 | 0.16 | 0.001 | 0.001 | 0.001 | - |
内蒙古高原东部 | 0.82 | 0.14 | 0.04 | 0.04 | 0 | 0.04 |
Tab.2 Calculation results of available surface water control method表2 地表水可利用量控制法计算结果 (亿m3) |
水资源三级区 | 2001-2016年多年平均 | |||
---|---|---|---|---|
地表水资源量 | 生态需水量 | 地表水耗水量 | 地下水可开采量 | |
合计 | 14.59 | 6.57 | 5.02 | 4.35 |
西拉木伦河及老哈河 | 10.54 | 4.46 | 3.81 | 3.24 |
乌力吉木仁河 | 1.86 | 1.02 | 0.68 | 0.24 |
西辽河下游区间(苏家堡以下) | 0.62 | 0.17 | 0.30 | 0.25 |
沿渤海西部诸河 | 0.49 | 0.21 | 0.14 | 0.24 |
滦河山区 | 0.25 | 0.10 | 0.01 | 0.21 |
内蒙古高原东部 | 0.82 | 0.61 | 0.08 | 0.18 |
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