摘要
基于HEC-HMS模型及地理信息系统平台,对辽宁省细河流域分辨率为90 m×90 m的数字高程数据进行预处理和基本计算,提取研究区水网并划分子流域,收集流域范围内土地利用及土壤类型信息,生成水文模拟基本计算单元。构建两套洪水演算方案对洪水过程进行模拟,方案1采用初损后损法、Snyder单位线法、退水曲线法和马斯京根法;方案2选用SCS曲线法、SCS单位线法、退水曲线法、马斯京根法,并根据实测数据对两种方案结果进行对比验证,以期提高细河流域山洪预报工作准确度。结果显示:方案1模拟结果更适用于细河流域实际的山洪预报工作,洪峰流量和径流深合格率分别为91.67%、100%,确定性系数均值0.79;方案2洪峰流量误差为91.67%,径流深误差合格率为83.33%,峰现时差在两场洪水预测中出现较大偏差,平均确定性系数为0.75;方案1中超渗产流计算方法在细河流域更加适用,模拟误差相对较小;两种方案在短时间强降水洪水汇流计算结果上更加精准。该研究成果可为山区小流域洪水灾害非工程设施建设及产汇流模拟提供一定理论依据和方法支撑。
Using HEC-HMS model and GIS platform,the digital elevation data with a resolution of 90 m×90 m in the Xihe River Basin of Liaoning Province is preprocessed and basically calculated.Consequentlythe water net⁃work in the study area is extracted and divided into sub basins;the land use and soil type information in the basin is collected;the basic calculation unit of hydrological simulation is generated.Two sets of flood calculation schemes are constructed to simulate the flood process.Scheme 1 uses the initial damage and post-loss method,along with Snyder unit line method,backwater curve method and Muskingen method.Scheme 2 uses SCS curve method,SCS unit line method,backwater curve method and Muskingen method.The results of the two schemes are compared and verified according to the measured data,so as to improve the accuracy of flash flood prediction in Xihe River Basin.The results show that the simulation results of scheme 1 are more suitable for the flash flood forecasting in the Xihe River Basin,the flood peak discharge and runoff depth pass rate are both 91.67%and 100%respectively,and the average certainty coefficient is 0.79.In scheme 2,the error of peak discharge is 91.67%,and the pass rate of runoff depth error is 83.33%,and the peak current difference has a large deviation in the prediction of the two floods,with an average certainty coefficient of 0.75.The calculation method of infiltra⁃tion-excess runoff in Scheme 1 is more applicable in the Xihe River Basin,and the simulation error is relatively small,the two schemes are more accurate in the calculation results of short-term heavy rainfall.The results of this study can provide theoretical basis and method support for the construction of non-structural measures and the yield and concentration simulation of flood disasters in small mountain basins.
作者
曹永强
王菲
齐静威
袁立婷
CAO Yongqiang;WANG Fei;QI Jingwei;YUAN Liting(School of Geographical Sciences,Liaoning Normal University,Dalian 116029)
出处
《中国防汛抗旱》
2020年第7期22-29,共8页
China Flood & Drought Management
基金
国家自然基金(51579126,51779114)
辽宁省百千万人才工程资助
大连市科技创新基金(2018J13SN116)。
关键词
山洪灾害
山洪预报
HEC-HMS水文模型
细河流域
辽宁省
flash flood disasters
flash flood forecasting
HEC-HMS hydrological model
Xihe River Basin
Liaon⁃ing Province
