DOI: 10.5194/hess-18-5289-2014
Scopus记录号: 2-s2.0-84919346822
论文题名: Assessment of surface water resources availability using catchment modelling and the results of tracer studies in the mesoscale Migina Catchment, Rwanda
作者: Munyaneza O ; , Mukubwa A ; , Maskey S ; , Uhlenbrook S ; , Wenninger J
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 12 起始页码: 5289
结束页码: 5301
语种: 英语
Scopus关键词: Calibration
; Climate models
; Decision making
; Digital storage
; Groundwater
; Reservoirs (water)
; Runoff
; Soil moisture
; Stream flow
; Surface water resources
; Water conservation
; Water resources exploration
; Catchment modelling
; Groundwater storage
; Hydrograph separation
; Hydrologic modelling
; Hydrological modeling
; Hydrological process
; Water resources availability
; Water resources planning
; Catchments
; catchment
; decision making
; hydrological modeling
; resource availability
; soil moisture
; streamflow
; surface water
; tracer
; water planning
; water resource
; Rwanda
英文摘要: In the present study, we developed a catchment hydrological model which can be used to inform water resources planning and decision making for better management of the Migina Catchment (257.4 km2). The semi-distributed hydrological model HEC-HMS (Hydrologic Engineering Center - the Hydrologic Modelling System) (version 3.5) was used with its soil moisture accounting, unit hydrograph, liner reservoir (for baseflow) and Muskingum-Cunge (river routing) methods. We used rainfall data from 12 stations and streamflow data from 5 stations, which were collected as part of this study over a period of 2 years (May 2009 and June 2011). The catchment was divided into five sub-catchments. The model parameters were calibrated separately for each sub-catchment using the observed streamflow data. Calibration results obtained were found acceptable at four stations with a Nash-Sutcliffe model efficiency index (NS) of 0.65 on daily runoff at the catchment outlet. Due to the lack of sufficient and reliable data for longer periods, a model validation was not undertaken. However, we used results from tracer-based hydrograph separation from a previous study to compare our model results in terms of the runoff components. The model performed reasonably well in simulating the total flow volume, peak flow and timing as well as the portion of direct runoff and baseflow. We observed considerable disparities in the parameters (e.g. groundwater storage) and runoff components across the five sub-catchments, which provided insights into the different hydrological processes on a sub-catchment scale. We conclude that such disparities justify the need to consider catchment subdivisions if such parameters and components of the water cycle are to form the base for decision making in water resources planning in the catchment. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78033
Appears in Collections: 气候变化事实与影响
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作者单位: University of Rwanda, School of Engineering, Department of Civil Engineering, P.O. Box 3900, Kigali, Rwanda; Nile Equatorial Lakes Subsidiary Action Program (NELSAP), Department of Water Resources Development, P.O. Box 6759, KN 81 St., Kigali, Rwanda; UNESCO-IHE Institute for Water Education, Department of Water Science and Engineering, P.O. Box 3015, DA Delft, Netherlands; Delft University of Technology, Section of Water Resources, P.O. Box 5048, GA Delft, Netherlands
Recommended Citation:
Munyaneza O,, Mukubwa A,, Maskey S,et al. Assessment of surface water resources availability using catchment modelling and the results of tracer studies in the mesoscale Migina Catchment, Rwanda[J]. Hydrology and Earth System Sciences,2014-01-01,18(12)