淮北平原五道沟地区降雨产流影响因素及变化规律研究

Study on Influencing Factors and Variation Rules of Rainfall Runoff Production in Wudaogou Area of Huaibei Plain

王婉婉 ¹杜富慧 ¹朱信泽 ²周超 ³杜嘉阳 ⁴丁钰童 ⁵徐荣艳 ⁵张美娜 ⁵王振龙³

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作者信息

1. 河北工程大学能源与环境工程学院,河北邯郸 056021
2. 江苏省水文水资源勘测局盐城分局,江苏盐城 224001
3. 安徽省(水利部淮委)水利科学研究院五道沟水文实验站,安徽蚌埠 233000
4. 重庆交通大学,重庆 400074
5. 河海大学水文水资源学院,江苏南京 210098
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摘要

利用五道沟实验站1972～2021年106场次降雨径流实测资料,采用回归分析法,开展了不同级别次降雨量P(暴雨、大雨、中雨)、雨前地下水埋深H0(Ⅰ级(0～0.4 m)、Ⅱ级(0.4～0.8 m)、Ⅲ级(0.8～1.2 m)、Ⅳ级(>1.2 m))和前期影响雨量Pa(Ⅰ级(17%～20%)、Ⅱ级(20%～23%)、Ⅲ级(23%～26%)、Ⅳ级(>26%))不同情景对产流的影响研究,并构建了多元回归计算模型.结果表明,次降雨量对降雨产流的影响起主要作用,其次为雨前地下水埋深和前期影响雨量;不同降雨级别下,暴雨情景次降雨量与径流呈二次曲线函数关系,大雨情景呈三次曲线函数关系,中雨情景在长时段连绵降雨型且P>35 mm、Pa>20%、H0<1.0 m条件下才可产流,呈三次曲线函数关系;在Ⅰ、Ⅲ级雨前地下水埋深情景中,次降雨量与径流均呈三次曲线函数关系,Ⅱ级呈二次曲线函数关系,Ⅳ级呈线性函数关系;在Ⅰ级前期影响雨量情景中,次降雨量与径流呈幂函数关系,Ⅱ级呈三次曲线函数关系,Ⅲ、Ⅳ级均呈二次曲线函数关系;通过统计分析降雨实测数据,径流深最终可表示为次降雨量、雨前地下水埋深和前期影响雨量3因素的函数关系,并建立了暴雨、大雨及中雨情景径流计算模型,拟合优度R2 均大于0.80,可用于淮北平原降雨径流预测.

Abstract

Based on the measured data of 106 rainfall runoff from 1972 to 2021 at Wudaogou experimental station,re-gression analysis was used to investigate the impact of the sub-rainfall P(heavy rain,heavy rain,moderate rain),ground-water depth H0(class Ⅰ:0-0.4 m,class Ⅱ:0.4-0.8 m,class Ⅲ:0.8-1.2 m,and class Ⅳ:>1.2 m)and the antecedent in-fluence rainfall Pa(class Ⅰ:17%～20%,class Ⅱ:20%-23%,class Ⅲ:23%-26%,class Ⅳ:>26%)on the runoff produc-tion at different scenarios,and a multiple regression calculation model was established.The results show that the precipi-tation plays a major role in the influence of rainfall runoff,followed by the groundwater buried depth before the rain and antecedent influence rainfall.Under different rainfall levels,there was a quadratic curve function relationship between the rainfall and runoff in the rainstorm scenario,a cubic curve function relationship in the heavy rain scenario,and a cubic curve function relationship in the moderate rain scenario when the long-term continuous rainfall type with P>35 mm,Pa>20%and H0<1.0 m could produce runoff.In the pre-rain groundwater depth scenario of grade Ⅰ and grade Ⅲ,the relationship between sub-rainfall and runoff is cubic curve function,the relationship of grade Ⅱ is quadratic function,and grade Ⅳ is linear function.The relationship between secondary rainfall and runoff is a power function in class Ⅰ,a cubic curve function in class Ⅱ,and a quadratic curve function in class Ⅲ and class Ⅳ.Through statistical analysis of the measured rainfall data,the runoff depth can finally be expressed as the function relationship of three factors:secondary rainfall,groundwater buried depth before rain and antecedent influence rainfall.The runoff calculation models of rain-storm,heavy rain and moderate rain scenarios were established,and the goodness of fit R2 is greater than 0.80,which can be used to predict rainfall runoff in Huaibei Plain.

关键词

降雨产流/降雨级别/雨前地下水埋深/前期影响雨量/淮北平原

Key words

rainfall runoff/rainfall level/groundwater buried depth before rain/antecedent influence rainfall/Huaibei plain

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出版年

2024

水电能源科学

中国水力发电工程学会华中科技大学武汉国测三联水电设备有限公司

水电能源科学

CSTPCD北大核心

影响因子：0.525

ISSN：1000-7709

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