A comparison of hydrological models for assessing the impact of land use and climate change on discharge in a tropical catchment

Cornelißen, Thomas; Diekkrüger, Bernd; Giertz, Simone

doi:10.1016/j.jhydrol.2013.06.016

Cited by 132 publications

(95 citation statements)

References 26 publications

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“…A key variable that can affect runoff generation could be land cover change [7]. Climate and land use change already have a large impact on the hydrological cycle in West African countries [8][9][10]. These changes can have direct or indirect impacts on the hydrological cycle of the watershed.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, study in an upland watershed in Sri Lanka, showed that replacement of natural forests by other agricultural land uses led to decreased base flows and increased surface runoff generation, while the annual water yield remained more or less unchanged [4]. Change in land cover can affect the microclimate of the given area [13] and the infiltration rates can be reduced on cultivated land compared to natural land cover [10,14].…”

Section: Introductionmentioning

confidence: 99%

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Land Use and Land Cover Changes under Climate Uncertainty: Modelling the Impacts on Hydropower Production in Western Africa

Obahoundje¹,

Ofosu

Akpoti³

et al. 2017

Hydrology

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Abstract:The Bui hydropower plant plays a vital role in the socio-economic development of Ghana. This paper attempt to explore the combined effects of climate-land use land cover change on power production using the (WEAP) model: Water Evaluation and Planning system. The historical analysis of rainfall and stream flow variability showed that the annual coefficient of variation of rainfall and stream flow are, respectively, 8.6% and 60.85%. The stream flow varied greatly than the rainfall, due to land use land cover changes (LULC). In fact, the LULC analysis revealed important changes in vegetative areas and water bodies. The WEAP model evaluation showed that combined effects of LULC and climate change reduce water availability for all of demand sectors, including hydropower generation at the Bui hydropower plant. However, it was projected that Bui power production will increase by 40.7% and 24.93%, respectively, under wet and adaptation conditions, and decrease by 46% and 2.5%, respectively, under dry and current conditions. The wet condition is defined as an increase in rainfall by 14%, the dry condition as the decrease in rainfall by 15%; current account is business as usual, and the adaptation is as the efficient use of water for the period 2012-2040.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Land Use and Land Cover Changes under Climate Uncertainty: Modelling the Impacts on Hydropower Production in Western Africa

Obahoundje¹,

Ofosu

Akpoti³

et al. 2017

Hydrology

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“…In these methods, numerical models are widely used (Twine et al, 2004;Kim et al, 2005;Li et al, 2009;Cornelissen et al, 2013;Mo et al, 2004). However, model parameterization of vegetation conditions is a big challenge, as the aforementioned complex underlying mechanisms may not be completely considered in the models.…”

mentioning

confidence: 99%

“…However, model parameterization of vegetation conditions is a big challenge, as the aforementioned complex underlying mechanisms may not be completely considered in the models. Therefore, the simulated effects of vegetation change on E T are highly dependent on model parameterizations, which may induce uncertainty (Cornelissen et al, 2013;Li et al, 2009). The paired comparative approach is often considered the best method; nonetheless, it is difficult to find two sites with similar meteorological conditions but different vegetation conditions (Li et al, 2009;Lorup et al, 1998).…”

mentioning

confidence: 99%

Monitoring the variations of evapotranspiration due to land use/cover change in a semiarid shrubland

Gong

Lei

Yang

et al. 2017

Hydrol. Earth Syst. Sci.

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Abstract. Evapotranspiration (E T ) is an important process in the hydrological cycle, and vegetation change is a primary factor that affects E T . In this study, we analyzed the annual and inter-annual characteristics of E T using continuous observation data from eddy covariance (EC) measurement over 4 years (1 July 2011 to 30 June 2015) in a semiarid shrubland of Mu Us Sandy Land, China. The Normalized Difference Vegetation Index (NDVI) was demonstrated as the predominant factor that influences the seasonal variations in E T . Additionally, during the land degradation and vegetation rehabilitation processes, E T and normalized E T both increased due to the integrated effects of the changes in vegetation type, topography, and soil surface characteristics. This study could improve our understanding of the effects of land use/cover change on E T in the fragile ecosystem of semiarid regions and provide a scientific reference for the sustainable management of regional land and water resources.

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“…In view of these challenges and the importance of reliable data on water availability, a proper estimation of the yearly water balance requires the application of hydrological models [17]. Moreover, models are useful for researchers in order to improve the scientific knowledge of processes, for engineers for operational purposes and for decision makers for management [18].…”

Section: The Hydrological Modelsmentioning

confidence: 99%

An Ensemble Approach Modelling to Assess Water Resources in the Mékrou Basin, Benin

Gaba¹,

Biao²,

Alamou³

et al. 2015

HYD

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Abstract:The aim of the study was to test the possible adequacy of an ensemble model to reproduce the observed flows in the Mékrou basin and in what measure this ensemble simulation could be used instead of a unique model. Single model applications showed shortcomings in terms of simulating both high and low flows at the same time. Thereby, the models were calibrated according to two different modes (high and low flows) and they were tested further through the elaboration of three various ensembles. The observed hydrographs were separated in three parts each in order to evaluate with much precision which model or ensemble fits best the hydrographs. On the basis of the Root Mean Squared Error (RMSE), the models and derived ensembles were assessed using discharge data. In this paper, the comparison is made between models, mean and median ensembles. Good results were obtained for all models and ensembles but the best ones were achieved by the mean-based ensemble.

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A comparison of hydrological models for assessing the impact of land use and climate change on discharge in a tropical catchment

Cited by 132 publications

References 26 publications

Land Use and Land Cover Changes under Climate Uncertainty: Modelling the Impacts on Hydropower Production in Western Africa

Land Use and Land Cover Changes under Climate Uncertainty: Modelling the Impacts on Hydropower Production in Western Africa

Monitoring the variations of evapotranspiration due to land use/cover change in a semiarid shrubland

An Ensemble Approach Modelling to Assess Water Resources in the Mékrou Basin, Benin

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