Hydrological Responses to Land Use/Cover Changes in the Olifants Basin, South Africa

Gyamfi, Charles; Ndambuki, J. M.; Salim, Ramadhan Wanjala

doi:10.3390/w8120588

Cited by 107 publications

(65 citation statements)

References 43 publications

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“…The simulation reflected the observed flow rationally, indicating a good performance of model in simulating the hydrological impacts of land use changes over the 2000 to 2032 periods [72,74,76,83]. The achieved R 2 (0.93 for calibration and 0.83 for validation) values express good evenness between the observed and simulated data [72,74,76,83]. NSE above 0.60, PBIAS < 10% and RSR < 0.6 were also achieved while positive values of PBIAS indicate the under estimation of the model.…”

Section: Calibration and Validationmentioning

confidence: 59%

“…The analysis focused on hydrological components including surface runoff, groundwater flow, evapotranspiration and water yield. The results are The achieved R 2 (0.93 for calibration and 0.83 for validation) values express good evenness between the observed and simulated data [72,74,76,83]. NSE above 0.60, PBIAS < 10% and RSR < 0.6 were also achieved while positive values of PBIAS indicate the under estimation of the model.…”

Section: Impacts Of Land Use Changes In Hydrological Componentsmentioning

confidence: 59%

“…The parameter values for NSE, RSR, PBIAS, and R 2 were, respectively, estimated as 0.65, 0.59, 5.0, and 0.69 in calibration, and 0.71, 0.54, 0.49, and 0.73 in validation. The simulation reflected the observed flow rationally, indicating a good performance of model in simulating the hydrological impacts of land use changes over the 2000 to 2032 periods[72,74,76,83].…”

mentioning

confidence: 58%

“…Nineteen flow parameters were selected to detect the SWAT sensitive parameters, based on the literature [69][70][71][72][73][74]. Global sensitivity analysis [73,[75][76][77] was employed in SWAT-CUP 2012 version 5.1.4 by allowing each parameter to be individually varied at a time [78].…”

Section: Soil and Water Assessment Tool (Swat) Modelmentioning

confidence: 99%

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Evaluating and Predicting the Effects of Land Use Changes on Hydrology in Wami River Basin, Tanzania

et al. 2020

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Understanding the variation in the hydrological response of a basin associated with land use changes is essential for developing management strategies for water resources. The impact of hydrological changes caused by expected land use changes may be severe for the Wami river system, given its role as a crucial area for water, providing food and livelihoods. The objective of this study is to examine the influence of land use changes on various elements of the hydrological processes of the basin. Hybrid classification, which includes unsupervised and supervised classification techniques, is used to process the images (2000 and 2016), while CA-Markov chain analysis is used to forecast and simulate the 2032 land use state. In the current study, a combined approach-including a Soil and Water Assessment Tool (SWAT) model and Partial Least Squares Regression (PLSR)-is used to explore the influences of individual land use classes on fluctuations in the hydrological components. From the study, it is evident that land use has changed across the basin since 2000 (which is expected to continue in 2032), as well as that the hydrological effects caused by land use changes were observed. It has been found that the major land use changes that affected hydrology components in the basin were expansion of cultivation land, built-up area and grassland, and decline in natural forests and woodland during the study period. These findings provide baseline information for decision-makers and stakeholders concerning land and water resources for better planning and management decisions in the basin resources' use.

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Section: Calibration and Validationmentioning

confidence: 59%

Section: Impacts Of Land Use Changes In Hydrological Componentsmentioning

confidence: 59%

mentioning

confidence: 58%

Section: Soil and Water Assessment Tool (Swat) Modelmentioning

confidence: 99%

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Evaluating and Predicting the Effects of Land Use Changes on Hydrology in Wami River Basin, Tanzania

et al. 2020

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“…The surface and groundwater abstractions were analyzed as in [16] using data obtained from the Water Resource Management Authority water permit database, satellite imagery, field assessments, Ministry of Agriculture, Lusaka Water and Sewerage Company, and the Groundwater Resources Management Support Programme database ( Figure S4, Supplementary Materials). The use of hydrologic models offers the advantage of spatially mapping the patterns of hydrological consequences resulting from LULC changes and allows for the comparison of basin changes in hydrological components with basin-scale changes in Land use/Land cover [25].…”

Section: Simulation Of Hydrological Components In Weap Modelmentioning

confidence: 99%

Impact of Land Use/Land Cover Change on Hydrological Components in Chongwe River Catchment

2019

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Chongwe River Catchment, a sub-catchment of the Zambezi River Basin, has been experiencing changes in land use/land cover (LULC) and in its hydrology. This study aims to assess the impact of LULC changes on the catchment's hydrological components such as streamflow, evapotranspiration and water abstractions. LULC change data, detected from the 1984, 1994, 2014 and 2017 USGS Landsat imagery using a maximum likelihood supervised classifier, were integrated into the WEAP Model along with soil, slope and hydro-climate data. The results showed that between 1984 and 2017 built-up area increased by 382.77% at 6.97 km 2 /year, irrigated agriculture increased by 745.62% at 1.70 km 2 /year, rainfed farms/ranch/grassland increased by 14.67% at 14.53 km 2 /year, forest land decreased by 41.11% at 22.33 km 2 /year and waterbodies decreased by 73.95% at 0.87 km 2 /year. Streamflow increased at a rate of 0.13 Mm 3 per annum in the wet seasons and showed a high variation with flow volume of 79.68 Mm 3 in February and 1.01 Mm 3 in September. Annual actual evapotranspiration decreased from 840.6 mm to 796.3 mm while annual water abstraction increased from 8.94 mm to 23.2 mm from the year 1984 to 2017. The pattern of LULC change between 1984 and 2017 has negatively impacted the hydrology of the Chongwe River Catchment. From these findings, an integrated catchment management and protection approach is proposed to mitigate the negative impacts of LULC dynamics on hydrological components in the Chongwe River Catchment.Sustainability 2019, 11, 6415 2 of 13 rainfall to water yield through altering an ecosystem's hydrological characteristics such as infiltration, evapotranspiration, and groundwater recharge capacity [7]. Understanding the impact of LULC change on watershed hydrology at catchment level could help to (i) identify and alleviate the occurrence of critical shifts in hydrologic processes, (ii) assess the water resources availability and their sustainable utilization under increasing population, agricultural expansion, and industrialization, and (iii) formulate appropriate policies to improve land use planning and spatial developments [8][9][10]. In this regard, direct field observations and spatial-temporal analysis of LULC change from remote sensing data play a crucial role in providing historical and current information to understand the effects on river ecosystem, guide urban densification and limit unsustainable urban expansion at catchment level [11][12][13].The Chongwe River Catchment, with a population of over 834,359 people, is a sub-catchment of the Zambezi River Basin [14,15], and has been experiencing changes in LULC influenced by the fast-growing population, infrastructure and social-economic developments particularly in Lusaka City [15][16][17]. About 45% of Lusaka City falls within the Chongwe River Catchment [16]. The majority of the people in the catchment depend on the Chongwe River and its main tributaries for their domestic, agriculture, industrial and socio-economic water needs. The demand for water has dra...

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Effects of Land Cover Change on Surface Runoff Using GIS and Remote Sensing: A Case Study Duhok Sub-basin

Hameed

Faqe

Rasul

2019

Environmental Remote Sensing and GIS in Iraq

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Hydrological Responses to Land Use/Cover Changes in the Olifants Basin, South Africa

Cited by 107 publications

References 43 publications

Evaluating and Predicting the Effects of Land Use Changes on Hydrology in Wami River Basin, Tanzania

Evaluating and Predicting the Effects of Land Use Changes on Hydrology in Wami River Basin, Tanzania

Impact of Land Use/Land Cover Change on Hydrological Components in Chongwe River Catchment

Effects of Land Cover Change on Surface Runoff Using GIS and Remote Sensing: A Case Study Duhok Sub-basin

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