Development of a cell-based model to derive direct runoff hydrographs for ungauged mountainous basins
Hunukumbura, P. B.; Weerakoon, S. B.; Herath, Srikantha
通讯作者Weerakoon, SB
2007-12
发表期刊JOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
卷号4期号:4页码:309–320
摘要A model to derive direct runoff hydrograph for an ungauged basin using the physical properties of the basin is presented. The basin is divided into grid cells and canal elements. Overland flow is generated from each grid cell of the basin by application of continuous effective rainfall of 1 mm/hr to the basin. The flow generated is routed through downstream grid cells and the canal elements using the kinematic wave approach. The travel time for direct runoff from each grid cell to the basin outlet is calculated and the S-curve is derived for the basin. The S-curve is used to derive the unit hydrograph of a given duration for the basin. The model, referred as Cell-basin model was applied to the Upper Kotmale Basin in Sri Lanka and the model predictions of direct runoff hydrographs for rainfall events agreed with the observations to a reasonable accuracy. Comparison of the unit hydrographs obtained from the model and from the conventional Snyder's synthetic unit hydrograph using regionalized parameters assuming the basin as an ungauged basin, with the unit hydrograph derived from the observations showed that the model predicted unit hydrograph was more suitable than that obtained by Snyder's method for Sri Lankan up country basins. Thus, the present model is a useful tool to obtain direct runoff hydrograph for ungauged basins.
关键词Ungauged Basin Gis Unit Hydrograph Mountainous Basin Direct Runoff Hydrograph Model Cell-based Model Cell-basin Model
语种英语
文献类型期刊论文
条目标识符http://ir.imde.ac.cn/handle/131551/6089
专题Journal of Mountain Science _Journal of Mountain Science-2007_Vol4 No.4
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Hunukumbura, P. B.,Weerakoon, S. B.,Herath, Srikantha. Development of a cell-based model to derive direct runoff hydrographs for ungauged mountainous basins[J]. JOURNAL OF MOUNTAIN SCIENCE,2007,4(4):309–320.
APA Hunukumbura, P. B.,Weerakoon, S. B.,&Herath, Srikantha.(2007).Development of a cell-based model to derive direct runoff hydrographs for ungauged mountainous basins.JOURNAL OF MOUNTAIN SCIENCE,4(4),309–320.
MLA Hunukumbura, P. B.,et al."Development of a cell-based model to derive direct runoff hydrographs for ungauged mountainous basins".JOURNAL OF MOUNTAIN SCIENCE 4.4(2007):309–320.
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