重庆市小流域河道管理范围划界探讨

Discussion on demarcation of river management scope of small watersheds in Chongqing City

小流域河道属季节性河流、常年流量小、固有河床窄,洪水陡涨陡落、洪泛区多,河道管理范围划界矛盾多。根据小流域河道的特点,结合重庆市河道管理范围划定的经验,对小流域河道的行洪区域开展分区分析研究,提出推求理论行洪区边界线为底线,避开管理矛盾突出的洪泛区,合理确定河道管理范围线的建议。

The river course in small watershed is characterized by seasonal river,low annual flow,narrow inherent riverbed,sharp flood rise and fall,multiple flood prone areas,many contradictions in demarcation of river manage-ment scope.According to the characteristics of river course in small watershed,combined with the experience of Chongqing City in demarcation of river management scope,zoning analysis and study were conducted on the flood discharge areas of small river basins,and it is proposed to infer the theoretical boundary line of the flood discharge area as the baseline,avoid the flood prone areas with prominent management conflicts,rationally determine the river management scope.