地球信息科学学报 ›› 2021, Vol. 23 ›› Issue (8): 1473-1483.doi: 10.12082/dqxxkx.2021.200621
收稿日期:
2020-10-21
修回日期:
2020-12-23
出版日期:
2021-08-25
发布日期:
2021-10-25
通讯作者:
丁永生
作者简介:
沈泽宇(1996— ),女,上海人,硕士生,主要从水文水资源研究。E-mail: 2420328104@qq.com
SHEN Zeyu1(), DING Yongsheng1,2,*(
), KONG Qiao1
Received:
2020-10-21
Revised:
2020-12-23
Online:
2021-08-25
Published:
2021-10-25
Contact:
DING Yongsheng
摘要:
洪水研究包括径流与淹没两种模式。为了探究流域降雨产汇流与淹没情况、提高洪水预报精度,本研究在传统流域水文模型的基础上耦合二维水动力学模型,建立水文-水动力耦合模型。以我国吉林温德河流域为研究实例,模拟了2017年“7·13”洪水在下游口前镇所处子流域洪水淹没过程。首先对基础数据进行预处理,建立HEC-HMS水文模型并进行参数优化后,最终获得流量过程水文结果作为水动力学模型边界条件,之后建立HEC-RAS二维水动力学模型对重要子流域进行淹没模拟。耦合模型计算结果显示,水文模型经多参数优化流量模拟的NSE系数为0.988,水动力计算最大淹没水深达9.3 m相对误差为-5.2%。从泛洪模拟结果来看,子流域上游部分的农田大量被淹,淹没水深范围在0.5~2.0 m,平均流速基本在1 m/s以下。下游口前镇内最大淹没水深接近1 m,水流速度0.2 m/s至1.5 m/s,与实际的淹没情况相吻合。研究表明,所建水文水动力耦合模型模拟计算的结果准确率较高,对具有复杂水文、水力条件的流域的洪水预报具有重要的指导意义。
沈泽宇, 丁永生, 孔乔. 降雨径流与洪水淹没模型耦合的应用研究[J]. 地球信息科学学报, 2021, 23(8): 1473-1483.DOI:10.12082/dqxxkx.2021.200621
SHEN Zeyu, DING Yongsheng, KONG Qiao. Application Study of Coupling Rainfall-runoff Modeling and Floodplain Inundation Mapping[J]. Journal of Geo-information Science, 2021, 23(8): 1473-1483.DOI:10.12082/dqxxkx.2021.200621
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