Research of calculation method of design flood in small basin of Xinjiang:Taking small watershed flood calculation along the line of external water supply project of Lop Nur potash mine for example
According to measured section data, the paper calculated flood peak flow which reflects the trace of flood investigation and used the method of probability and statistics to analyze the ratio of screening large flood peak.It used the comprehensive frequency curve of mode ratio of annual maximum peak flow to derive the design flood of small watershed and verify the relative reasonableness of calculation method.The method can provide a new way for the calculation of small watershed flood in Xinjiang alluvial fan area.