白龙江拱坝河水沙变异诊断及成因研究  

Diagnosis and causes of water and sediment variation in Gongba River,Bailong River

作　　者：刘玺铭 LIU Ximing(Gansu Longnan Hydrological Station,Chengxian 742500,China)

机构地区：[1]甘肃省陇南水文站,甘肃成县742500

出　　处：《水利建设与管理》2023年第3期42-48,共7页Water Conservancy Construction and Management

摘　　要：为研究拱坝河流域水沙变异年份及成因,本文在收集实测水文资料的基础上,采用Man-Kendall法、滑动T检验、双累积曲线对水沙变化趋势及变异进行诊断,采用累积斜率变化率法分析气候变化、人类活动对水沙变异的贡献量,研究了其主要影响因素。结果表明:近40年来,降水量呈显著增大趋势,径流量、输沙量均出现减小趋势;径流量第一个变异期Ba内,人类活动影响贡献率为66.6%,变异期Ba1内,贡献率为47.1%;输沙量第一个变异期Bb内,人类活动贡献率为15.7%,变异期Bb1、Bb2内,贡献率为67.4%、61.3%;水电站的兴建与运行,是造成流域水沙变异的主要因素。本次研究可为流域水资源利用、水电开发提供数据支持。In order to study the years and causes of water and sediment variation in Gongba River Basin,based on the collected measured hydrological data,Man-Kendall,sliding T method and double accumulation curve are used to diagnose the water and sediment change trend and variation,and the cumulative slope change rate method is used to analyze the contribution of climate change and human activities to water and sediment variation,and the main influencing factors are studied.The results show that in recent 40 years,precipitation has increased significantly,while the runoff and sediment runoff have decreased.In the first Ba variation period of runoff,the contribution rate of human activities is 66.6%.In the Ba1 variation period,the contribution rate is 47.1%.In the first Bb variation period of sediment runoff,the contribution rate of human activities is 15.7%.In the variation periods Bb1 and Bb2,the contribution rate is 67.4%and 61.3%.The construction and operation of hydropower stations are the main factors causing the variation of water and sediment in the basin.This study can provide data support for water resources utilization and hydropower development in the basin.

关 键 词：降水量 径流量 输沙量 

分 类 号：TV121.2[水利工程—水文学及水资源]