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基于SWAT模型的珠江流域地下水资源评价

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  • NETL
  • NSTL
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在梳理珠江流域地下水资源评价现状及历史的基础上,讨论了SWAT分布式水文模型基本原理和基础数据库,将珠江流域划分为 129个地下水子流域,充分考虑岩溶、基岩裂隙及孔隙含水介质参数敏感性的基础上,基于 9个水文站2008-2016年逐月实测径流量进行参数率定和模型校准,并根据 1957-2017年降雨量计算不同年份降雨保证率,分析评价珠江流域多年地下水资源量,最后开展降雨入渗系数和地下水补给模数参数反演.通过本次评价,珠江流域 2010-2016年平均补给量为 1 488.02亿m3,特枯年(2011)、平水年(2010)及丰水年(2016)地下水总补给量分别为 719.49亿m3、1 446.82亿m3、1 781.87亿m3,其中丰水年的降雨量约为特枯年的 1.7倍,地下水补给量为 2.48倍,岩溶、基岩裂隙及孔隙含水介质的年均补给总量分别为 529.91 亿 m3、445.13 亿 m3、512.98 亿 m3,通过参数反演获得年均地下水补给模数为 10.83 L/s·km2,降雨入渗系数为 0.246,以期为流域内地下水开发利用与治理保护提供数据支撑和科学服务.
Groundwater Resources Evaluation in the Pearl River Basin Based on SWAT Model
On the basis of reviewing the current situation and history of groundwater resources evaluation in the Pearl River basin,this paper discusses the basic principle and basic database of SWAT distributed hydrological model.We divided the Pearl River basin into 129 four-level groundwater systems,and fully considered the parameter sensitivity of karst,bedrock fissures and pore aquifer media.Based on the monthly measured runoff of 9 hydrological stations from 2008 to 2016,we carried out parameter calibration and model calibration,calculated the rainfall assurance rate in different years according to the rainfall from 1957 to 2017,analyzed and evaluated the multi-year groundwater resources in the Pearl River basin.Finally,we carried out the inversion of rainfall infiltration coefficient and groundwater recharge model parameters.Through this assessment,the average recharge of the Pearl River basin from 2010 to 2016 is 148.802 billion m3,and the total recharge of groundwater in extra dry years(2011),normal years(2010)and high water years(2016)are 71.949 billion m3,144.682 billion m3 and 178.187 billion m3 respectively,of which the rainfall in high water years is about 1.7 times that in extra dry years,the groundwater recharge is 2.48 times,karst.The total annual recharge of bedrock fissure and pore water bearing medium is 52.991 billion m3,44.513 billion m3 and 51.298 billion m3 respectively.Through parameter inversion,the average annual groundwater recharge modulus is 10.83 L/s·km2 and the rainfall infiltration coefficient is 0.246,in order to provide data support and scientific services for groundwater development,utilization,treatment and protection in the basin.

distributed hydrological modelgroundwater resourcesPearl River basinwater resources evaluationparameter inversionhydrogeology

赵良杰、王莹、周妍、曹建文、杨杨、王喆

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中国地质科学院岩溶地质研究所,自然资源部/广西岩溶动力学重点实验室,广西桂林 541004

广东省地质环境监测总站,广东广州 510510

中国地质大学,北京 100083

分布式水文模型 地下水资源 珠江流域 水资源评价 参数反演 水文地质

中国地调局地质调查项目国家自然科学基金青年基金广东省地下水资源调查监测评价项目

DD20190342421022960835-210Z22803141

2024

10.3799/dqkx.2022.004

地球科学
中国地质大学

地球科学

CSTPCD北大核心
影响因子：1.447
ISSN：1000-2383
年,卷(期)：2024.49(5)
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