Rajyalakshmi N V, Dutta S
Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati, India.
Water Sci Technol. 2006;53(10):131-9. doi: 10.2166/wst.2006.306.
An approach for computing the instantaneous unit hydrograph of rice agriculture dominated watesheds is proposed using the topology and hydraulic charcterstics of its stream network and the hydrologic behaviour of the rice agriculture area. The effect of rice agriculture on the watershed response is considered as partial sink areas. The sink factor, a time-variant weight factor for a particular storm event, is computed from the daily water balanace equation of the rice field. The critcal features of the simulated instantaneous unit hydrographs in three gauged watersheds located in the river Mahanadi, India were then compared with that of the observed 24-hr unit hydrograph. The comparison shows a significant correlation between the two results.
提出了一种利用水稻农业主导流域的河网拓扑结构、水力特性以及水稻种植区的水文行为来计算瞬时单位线的方法。水稻农业对流域响应的影响被视为部分汇流区。汇流因子是特定暴雨事件的时变权重因子，通过稻田的日水量平衡方程计算得出。然后，将印度马哈纳迪河三个测量流域模拟的瞬时单位线的关键特征与观测到的24小时单位线进行了比较。比较结果表明两者之间存在显著相关性。
