基于GIS的西峰区沟道雨洪资源可利用量研究

发布时间：2018-05-31 03:30

本文选题：单次暴雨分析法 + 典型年法　；参考：《水文》2017年01期

【摘要】：利用庆阳市西峰区的DEM、Quickbird影像资料对西峰区沟道特征进行沟道特征分析,并分析了沟道不同降水频率下雨洪特征。以司家沟为典型沟道,采取典型年法和单次暴雨分析法将不同降水频率典型年中大于20mm的单次降水与基准暴雨量相对应,计算出典型年的雨洪总量(可收集利用量)和单次降水的洪峰流量,并进一步分析了不同降水保证率的各区域雨洪资源量。结果表明,西峰区各沟道雨洪资源量的总体趋势为高保证率雨洪资源量少、低保证率雨洪资源量大,但是由于洪水频率跟降雨频率不同步,在干旱年降水频率低时,洪水频率有可能较大,因此干旱年份对雨洪资源的利用尤为重要。
[Abstract]:The channel characteristics of the channel in Xinfeng area of Qingyang city were analyzed by using the Demm Quickbird image data, and the characteristics of rain and flood at different precipitation frequency were analyzed. Taking Sijiagou as the typical channel, the typical year method and the single rainstorm analysis method are adopted to correspond the single precipitation with the base storm rainfall, which is larger than 20mm in typical year with different precipitation frequency. The total amount of rain and flood (collectible utilization) and the Hong Feng flow of a single precipitation in a typical year are calculated, and the amount of rain flood resources in different regions with different rainfall guarantee rates is further analyzed. The results show that the general trend of rain flood resources in Xifeng region is that the amount of rain flood resources with high guarantee rate is less and the amount of rain flood resources with low guarantee rate is large. However, because the frequency of flood is out of step with the frequency of rainfall, when the frequency of precipitation is low in dry year, The frequency of flood is likely to be high, so the utilization of rain and flood resources in dry years is particularly important.
【作者单位】：甘肃省水土保持科学研究所;
【基金】：陇原青年创新人才扶持计划(甘组通字[2014]93号) 甘肃省科技厅重大专项课题(1203FKDA035) 甘肃省水利科研技术推广项目(甘水科外发[2013]293号;[2014]223号;[2015]55号) 甘肃省科技支撑计划(1204NKCA087) 甘肃省水利厅水资源费项目(甘财农[2010]162号)
【分类号】：TV213.9;P208

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