The lack of flood measurement data due to complex and changeable landform brings about many inconveniences to hydro-project construction in southwest China. According to data of design flood peak discharge (Qp) and collecting area (F) at 66 hydrologic stations in 11 basins in the southwest region of China, the relationship between Qp and F is researched by statistical analysis. Results show the Qp-F relationships in the Jialing River basin, Tuojiang River basin, Fujiang River basin, Minjiang River basin and Lancang River basin follow linear relationship; while in the Dadu River basin, Qingyi River basin and Yalong River basin, the Qp-F relationships match well with exponential relationship; and in the Jinsha River basin, Nujiang River basin and Yarlung Zangpo River basin the relationships conform well to power function. The research results offer reference for obtaining the Qp-F relationships in ungauged river basins.
Key words
design flood peak discharge /
collecting area of river basin /
drainage basins in southwest China /
linear relationship /
exponential relationship /
power functional relationship
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