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| 地表水地下水耦合模型在大型山丘平原交错区的研发与应用 | |
| 引用本文： | 孙青言,陆垂裕,郭辉,严聆嘉,张博.地表水地下水耦合模型在大型山丘平原交错区的研发与应用[J].地理科学进展,2021,40(8):1371-1385. |
| 作者姓名： | 孙青言 陆垂裕 郭辉 严聆嘉 张博 |
| 作者单位： | 1.中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京 100038 2.黑龙江省水利水电勘测设计研究院,哈尔滨 150080 |
| 基金项目： | 国家重点研发计划项目(2016YFC0401404);黑龙江省应用技术研究与开发计划项目(GA19C005);国家自然科学基金项目(51509264);国家自然科学基金项目(51879066) |
| 摘 要： | 大型山丘平原交错区复杂的自然地理和人类活动特征增加了水文循环研究和水资源评价、管理的难度,地表水地下水耦合模型作为流域/区域水文循环模拟的重要工具,为解决这类大型区域诸多水文水资源问题提供了便利。针对目前地表水地下水耦合模型难以兼顾精度和效率的问题,论文提出了一种新型半松散耦合机制,将三维有限差分地下水流数值模型嵌入半分布式水文模型MODCYCLE,摒弃了目前流行的水文响应单元(HRU)与地下水网格单元空间和信息转换方式,通过建立子流域—网格单元的空间关联和地表水文—地下水流之间的实时信息交互,实现大型山丘平原交错区的地表水地下水耦合模拟。在三江平原构建了模型并开展应用研究。校验评估显示,模型达到了良好的模拟效果,具备了水文循环现状模拟和预测未来的能力。最后,利用该模型输出分析了三江平原2002—2014年的地表水地下水转化关系。结果表明,降水量和农业灌溉量的增加导致全区域土壤水蓄量年均增加6.51亿m3,但却使地表水和地下水储量分别减少0.99亿m3/a和3.03亿m3/a,降水量的增加并没有通过产流和入渗补给改善因用水急剧增加引起的地表水、地下水衰减的趋势;不同分区的降水入渗补给系数和基流指数差异显著,是多种自然和人为因素综合作用的结果。相关成果可为类似地区水文循环研究和水资源评价工作提供参考。 |
| 关 键 词： | 地表水地下水耦合模型 半松散耦合机制 大型区域 水文循环 MODCYCLE 三江平原 |
| 收稿时间： | 2020-12-10 |
| 修稿时间： | 2021-03-03 |
A coupled surface water-groundwater model and its application in a large-scale hill-plain region |
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| SUN Qingyan,LU Chuiyu,GUO Hui,YAN Lingjia,ZHANG Bo.A coupled surface water-groundwater model and its application in a large-scale hill-plain region[J].Progress in Geography,2021,40(8):1371-1385. | |
| Authors: | SUN Qingyan LU Chuiyu GUO Hui YAN Lingjia ZHANG Bo |
| Institution: | 1. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China 2. Heilongjiang Provincial Water Conservancy and Hydroelectric Power Investigation, Design and Research Institute, Harbin 150080, China |
| Abstract: | The complex physical geography and human activities in large-scale hill-plain regions increase the difficulty of hydrologic cycle research and water resources evaluation and management. As an important tool for basin or regional hydrologic cycle simulation, the coupled surface water-groundwater model provides convenience for solving many hydrologic and water resources problems in large regions. To address the conflict between precision and efficiency of modeling, a new semi-loose coupled mechanism was proposed in the study, which embeds the 3D finite difference groundwater flow numerical model into a semi distributed hydrologic model (MODCYCLE). The mechanism abandons the current popular spatial and information conversion method between hydrologic response units (HRUs) and groundwater grid cells, but establishes the spatial association of subbasins and grid cells and the real-time information exchange between surface water and groundwater systems. The model was built and applied in the Sanjiang Plain. The calibration and validation of the model show that it has the ability to simulate the past and predict the future of the hydrologic cycle. Finally, the relationship of surface water and groundwater in the Sanjiang Plain from 2002 to 2014 was analyzed by using the model output. The results show that the increase of precipitation and agricultural irrigation led to an increase of 651 million m3/a of soil water storage in the whole region, but reduced the reserves of surface water and groundwater by 99 million m3/a and 303 million m3/a respectively. The increase of precipitation did not improve the attenuation trend of water resources caused by the rapid increase of water consumption. There were significant differences in the precipitation recharge coefficient and base flow index in different regions, which were the result of the combined action of natural and human factors. The results can provide references for the research of hydrologic cycle and the evaluation of water resources in this region. |
| Keywords: | coupled surface water-groundwater model semi-loose coupled mechanism large-scale region hydrologic cycle MODCYCLE Sanjiang Plain |
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