scholarly journals Hydro-Climatic Modelling of an Ungauged Basin in Kumasi, Ghana

2017 ◽  
Author(s):  
Marian Amoakowaah Osei ◽  
Leonard Kofitse Amekudzi ◽  
David Dotse Wemegah ◽  
Kwasi Preko ◽  
Emmanuella Serwaa Gyawu ◽  
...  
Keyword(s):  
Resource Management ◽  
Water Resource ◽  
Water Loss ◽  
Surface Runoff ◽  
Stream Flow ◽  
Water Resource Management ◽  
Swat Model ◽  
Water Yield ◽  
Holistic View ◽  
Calibration And Validation

Abstract. The 13 km2 Owabi catchment provides about 20 % of water needs of the Kumasi metropolis has in recent times been prone to high anthropogenic activities, a source of worry to water resource management. A complementary hydro-climatic study of Owabi watershed has been carried out using Soil-Water-Assessment-Tool (SWAT) with the aim of simulating the stream-flow and water balance of the watershed and to predict its future state. The QGIS interface was used to launch SWAT for QSWAT. Stream-flow output from the model was calibrated against an empirically derived stream-flow dataset for Owabi and the efficacy of the technique tested. The SUFI-2 algorithm was used for calibration and validation on both daily and monthly temporal resolutions. Water loss from the catchment was due to evapotranspiration process followed by surface runoff. The model showed better prediction and low uncertainty for both calibration and validation at the monthly than daily timescale. From 2020 to 2050 under Representative Concentration Pathway 8.5 (RCP8.5), catchment water loss is expected to shift from the dominant evapotranspiraton to surface runoff. This would lead to increases in water yield and stream-flow amount. In general, the use of the SWAT model for hydrological assessment of the Owabi catchment has been successful and further studies on the assessment of water quality and pollution is currently being undertaken to provide a holistic view of water resource management at the catchment. This would aid effective decision making by water resource managers and boost water production for the Kumasi metropolis in the long-term.

scholarly journals Stream flow simulation and verification in ungauged zones by coupling hydrological and hydrodynamic models: a case study of the Poyang Lake ungauged zone

2017 ◽  
Vol 21 (11) ◽  
pp. 5847-5861 ◽  
Author(s):  
Ling Zhang ◽  
Jianzhong Lu ◽  
Xiaoling Chen ◽  
Dong Liang ◽  
Xiaokang Fu ◽  
...  
Keyword(s):  
Water Resource ◽  
Stream Flow ◽  
Assessment Tool ◽  
Poyang Lake ◽  
Swat Model ◽  
Water Yield ◽  
Lake Basin ◽  
Observation Data ◽  
Wet Season ◽  
Annual Water

Abstract. To solve the problem of estimating and verifying stream flow without direct observation data, we estimated stream flow in ungauged zones by coupling a hydrological model with a hydrodynamic model, using the Poyang Lake basin as a test case. To simulate the stream flow of the ungauged zone, we built a soil and water assessment tool (SWAT) model for the entire catchment area covering the upstream gauged area and ungauged zone, and then calibrated the SWAT model using the data in the gauged area. To verify the results, we built two hydrodynamic scenarios (the original and adjusted scenarios) for Poyang Lake using the Delft3D model. In the original scenario, the upstream boundary condition is the observed stream flow from the upstream gauged area, while, in the adjusted scenario, it is the sum of the observed stream flow from the gauged area and the simulated stream flow from the ungauged zone. The experimental results showed that there is a stronger correlation and lower bias (R2 = 0.81, PBIAS  =  10.00 %) between the observed and simulated stream flow in the adjusted scenario compared to that (R2 = 0.77, PBIAS  =  20.10 %) in the original scenario, suggesting the simulated stream flow of the ungauged zone is reasonable. Using this method, we estimated the stream flow of the Poyang Lake ungauged zone as 16.4 ± 6.2 billion m3 a−1, representing ∼ 11.24 % of the annual total water yield of the entire watershed. Of the annual water yield, 70 % (11.48 billion m3 a−1) is concentrated in the wet season, while 30 % (4.92 billion m3 a−1) comes from the dry season. The ungauged stream flow significantly improves the water balance with the closing error decreased by 13.48 billion m3 a−1 (10.10 % of the total annual water resource) from 30.20 ± 9.1 billion m3 a−1 (20.10 % of the total annual water resource) to 16.72 ± 8.53 billion m3 a−1 (10.00 % of the total annual water resource). The method can be extended to other lake, river, or ocean basins where observation data is unavailable.

Considerations in managing the fill rate of the Grand Ethiopian Renaissance Dam Reservoir using a system dynamics approach

2016 ◽  
Vol 14 (1) ◽  
pp. 33-43 ◽  
Author(s):  
Bruce Keith ◽  
David N Ford ◽  
Radley Horton
Keyword(s):  
Climate Change ◽  
Resource Management ◽  
System Dynamics ◽  
River Basin ◽  
Water Resource ◽  
Stream Flow ◽  
Management Strategy ◽  
Water Resource Management ◽  
Nile River ◽  
Fill Rate

The purpose of this study is to evaluate simulated fill rate scenarios for the Grand Ethiopian Renaissance Dam while taking into account plausible climate change outcomes for the Nile River Basin. The region lacks a comprehensive equitable water resource management strategy, which creates regional security concerns and future possible conflicts. We employ climate estimates from 33 general circulation models within a system dynamics model as a step in moving toward a feasible regional water resource management strategy. We find that annual reservoir fill rates of 8–15% are capable of building hydroelectric capacity in Ethiopia while concurrently ensuring a minimum level of stream flow disruption into Egypt before 2039. Insofar as climate change estimates suggest a modest average increase in stream flow into the Aswan, climate changes through 2039 are unlikely to affect the fill rate policies. However, larger fill rates will have a more detrimental effect on stream flow into the Aswan, particularly beyond a policy of 15%. While this study demonstrates that a technical solution for reservoir fill rates is feasible, the corresponding policy challenge is political. Implementation of water resource management strategies in the Nile River Basin specifically and Africa generally will necessitate a national and regional willingness to cooperate.

scholarly journals Spatiotemporal Analysis of Water Resources in the Haridwar Region of Uttarakhand, India

2020 ◽  
Vol 12 (20) ◽  
pp. 8449
Author(s):  
Shray Pathak ◽  
Chandra Shekhar Prasad Ojha ◽  
Rahul Dev Garg ◽  
Min Liu ◽  
Daniel Jato-Espino ◽  
...  
Keyword(s):  
Water Resource ◽  
Surface Runoff ◽  
Water Resource Management ◽  
Curve Number ◽  
Spatiotemporal Analysis ◽  
Water Yield ◽  
Yield Model ◽  
Natural Resource Conservation ◽  
Natural Resource Conservation Service ◽  
Annual Water

Watershed management plays a dynamic role in water resource engineering. Estimating surface runoff is an essential process of hydrology, since understanding the fundamental relationship between rainfall and runoff is useful for sustainable water resource management. To facilitate the assessment of this process, the Natural Resource Conservation Service-Curve Number (NRCS-CN) and Geographic Information Systems (GIS) were integrated. Furthermore, land use and soil maps were incorporated to estimate the temporal variability in surface runoff potential. The present study was performed on the Haridwar city, Uttarakhand, India for the years 1995, 2010 and 2018. In a context of climate change, the spatiotemporal analysis of hydro meteorological parameters is essential for estimating water availability. The study suggested that runoff increased approximately 48% from 1995 to 2010 and decreased nearly 71% from 2010 to 2018. In turn, the weighted curve number was found to be 69.24, 70.96 and 71.24 for 1995, 2010 and 2018, respectively. Additionally, a validation process with an annual water yield model was carried out to understand spatiotemporal variations and similarities. The study recommends adopting water harvesting techniques and strategies to fulfill regional water demands, since effective and sustainable approaches like these may assist in the simultaneous mitigation of disasters such as floods and droughts.

scholarly journals Hydrological Modeling of an Ungauged River Basin Using SWAT Model for Water Resource Management Case of Kayanga River Upstream Niandouba Dam

2020 ◽  
Vol 9 (1) ◽  
pp. 29 ◽  
Author(s):  
Issa Lèye ◽  
Soussou Sambou ◽  
Moussé Landing Sané ◽  
Ibrahima Ndiaye ◽  
Didier Maria Ndione ◽  
...  
Keyword(s):  
Resource Management ◽  
River Basin ◽  
Water Resource ◽  
Water Resource Management ◽  
Hydrological Modeling ◽  
Swat Model

scholarly journals Hydrological simulation as subside for management of surface water resources at the Mortes River Basin

2016 ◽  
Vol 40 (4) ◽  
pp. 390-404 ◽  
Author(s):  
Eliete Nazaré Eduardo ◽  
Carlos Rogério de Mello ◽  
Marcelo Ribeiro Viola ◽  
Phillip Ray Owens ◽  
Nilton Curi
Keyword(s):  
Resource Management ◽  
Water Resources ◽  
River Basin ◽  
Water Resource ◽  
Water Resource Management ◽  
Swat Model ◽  
Model Performance ◽  
Management Tool ◽  
Hydrological Simulation ◽  
Surface Water Resources

ABSTRACT Hydrological models are tools which describe processes and allow predicting the results of making management decisions, and are an important water resource management tool, especially for small-sized watersheds. This work had as an objective to test different calibration strategies and apply the SWAT model for hydrological simulation of the Mortes River Basin, MG. We evaluated 6 fluviometric stations, with drainage area between 272 and 6070 km² for purposes of water resource management. The evaluation of the model performance was conducted by using Nash-Sutcliffe coefficients (CNS) and percent bias (PBIAS). The results obtained from the statistic indices applied in the analysis of the model performance qualified the SWAT hydrological model as adequate for streamflow simulation in the Mortes River Basin. The adopted strategies attest to the applicability of the model as a management tool for water resources planning for other small-sized watersheds without data, in order to plan for rational water use.

Catchment surveillance for water resource management

Waterlines ◽  
1997 ◽  
Vol 16 (1) ◽  
pp. 23-25
Author(s):  
Barry Lloyd ◽  
Teresa Thorpe
Keyword(s):  
Resource Management ◽  
Water Resource ◽  
Water Resource Management
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