IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2007  > Vol4 No.4
Development of a cell-based model to derive direct runoff hydrographs for ungauged mountainous basins
Hunukumbura, P. B.; Weerakoon, S. B.; Herath, Srikantha
Corresponding AuthorWeerakoon, SB
2007-12
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
Volume4Issue:4Pages:309–320
AbstractA 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.
KeywordUngauged Basin Gis Unit Hydrograph Mountainous Basin Direct Runoff Hydrograph Model Cell-based Model Cell-basin Model
Language英语
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6089
CollectionJournal of Mountain Science _Journal of Mountain Science-2007_Vol4 No.4
Recommended Citation
GB/T 7714
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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