江苏省无资料山丘区产汇流计算方法与模型构建研究

Study on calculation method and model construction of runoff yield and concentration in hilly regions without data in Jiangsu Province

江苏省部分山丘区受客观自然条件限制,缺乏水文观测设施和实测数据,洪水预报中传统的参数移植方法,受预报人员经验性和主观性影响较大,预报精度不能满足需求。因此需要研究一种对水文资料依赖性小的计算方法,构建无资料山丘区产汇流模型,解决无资料地区水文分析计算难题。本文通过选取典型区域分析洪水类型构成和时空分布特征,确定产汇流模式,基于地貌单位瞬时线方法确定流域地形地貌特征与流域水文响应间的对应关系,进而建立无资料山丘区产汇流计算模型。通过对实测洪水和模型模拟计算成果进行对比,证明该模型模拟效果良好,可供类似无水文观测资料地区借鉴。

Some hilly regions in Jiangsu Province are limited by objective natural conditions.They are lack of hydrological observation facilities and measured data.The traditional parameter transplantation method in flood prediction is greatly affected by the experience and subjectivity of forecasters.The prediction accuracy can not meet the needs.Therefore,a calculation method with less dependence on hydrological data is studied to build a model of runoff yield and concentration in hilly areas without data so as to solve the problem of hydrological analysis and calculation in areas without data.The flood type composition as well as temporal and spatial distribution characteristics are analyzed by selecting typical regions in the paper.The runoff yield and concentration modes are determined.The corresponding relationship between the topographic and geomorphic features of the basin and the hydrological response of the basin is determined based on the geomorphic unit instantaneous line method.The runoff yield and concentration calculation model in hilly regions without data is established accordingly.The comparison between the measured flood and the model simulation calculation results shows that the model has good simulation effect,which can be used for reference in similar areas without hydrological observation data.