Quantifying spatiotemporal impacts of hydro-dams on land use/land cover changes in the Lower Mekong River Basin

Cho, Myung Sik; Qi, Jiaguo

doi:10.1016/j.apgeog.2021.102588

Cited by 14 publications

(10 citation statements)

References 65 publications

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“…Under this rule, each spatial unit for watersheds was analyzed to find the spatial units having significant influences on dams. Also, since little is known about which watershed level accounts for the impacts of dams on watersheds, this study conducted the Mann-Whitney U test for each watershed level (i.e., [7][8][9][10][11] to select the appropriate watershed level, which elucidates the influences of dams on watersheds in specific spatial units. Additionally, the results of the Mann-Whitney U test in terms of spatial units and watershed level were compared in upstream and downstream watersheds to examine the different consequences of dams on upstream and downstream watersheds.…”

Section: Quantification Of Spatial Pattern Of Dam Results On Watershedsmentioning

confidence: 99%

“…The summary of results of comparing Mann-Whitney U tests for P1 (before the boom of dams) and P2 (after the boom of dams). The comparison was conducted over upstream (Up) and downstream (Down), watershed levels (7)(8)(9)(10)(11), and spatial units (1)(2)(3)(4)(5)(6)(7)(8). o indicates that there was a failure to the rejection of the null hypothesis during the P1 (p ≥ 0.1) and there was the rejection of the null hypothesis during the P2 (p < 0.1).…”

Section: Mann-whitney U Tests For Various Levels and Spatial Unitsmentioning

confidence: 99%

“…The spatial patterns of the environmental consequences of dams can improve the EIAs of dams by providing the spatial baseline information representing the spatial boundaries of the influence of dams on the environment [10,11]. Remote sensing approaches were used to determine the spatial patterns, based on their time-series observations over extensive space [9,12].…”

Section: Introductionmentioning

confidence: 99%

“…Remote sensing approaches were used to determine the spatial patterns, based on their time-series observations over extensive space [9,12]. Some studies determined that the distance of the influence of dams on the environment is mostly within 5-10 km around the dam site [11,13] and up to 80 km [4]. While the spatial patterns of influences of dams on near areas were studied, those of dams Land 2023, 12, 2154 2 of 20 on distant areas remain poorly characterized.…”

Section: Introductionmentioning

confidence: 99%

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Determination of Spatial Pattern of Environmental Consequences of Dams in Watersheds

Cho,

2023

Land

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Many hydro-dams have been built for beneficial gains, but they are causing numerous unintended negative effects on the environment. The complexity of dam impacts and the insufficient knowledge of developing countries result in many uncertainties in managing land systems and environmental impact assessments (EIAs). Also, considering the consequences beyond the dam sites proved challenging in EIAs. In this context, this paper aims to determine the spatial pattern of the environmental consequences of dams, quantify the distance of impacts, and identify different patterns in both upstream and downstream areas. We considered the hydrological linkage of dams with wetlands in watersheds and the spatial relationship between watersheds to explicate the spatial pattern. Two hundred and ninety wetlands in the Mekong, Salween, and Irrawaddy Basins were categorized into those linked with dams and those without dams, and the hydrological characteristics were statistically compared for two periods (before and after the dam booms) using the Mann–Whitney U test. The watersheds having significant differences were found, and their spatial relationship in terms of location (i.e., upstream and downstream) and distance was determined by utilizing the HydroBASINS’ Pfafstetter coding system. The results indicate that the impacts of dams on downstream areas extend significantly farther than their effects on upstream regions in HydroBASINS level-7 representation. The quantitatively determined spatial patterns on upstream and downstream areas can provide accurate spatial baseline information in land system management and EIA.

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Section: Quantification Of Spatial Pattern Of Dam Results On Watershedsmentioning

confidence: 99%

Section: Mann-whitney U Tests For Various Levels and Spatial Unitsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Determination of Spatial Pattern of Environmental Consequences of Dams in Watersheds

Cho,

2023

Land

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“…Water storage in reservoirs has a major impact on land-use change and brings largescale social effects [12][13][14]. When reservoirs are built, various types of land use vanish; in this context, the most socially significant and sensitive processes are the loss of settlements or individual residential and industrial buildings along watercourses [15,16].…”

Section: Introductionmentioning

confidence: 99%

Water Reservoirs as a Driver of Anthropogenic Changes in Landscape and Transport Networks: The Czech Republic Experience

Havlíček

Dostál

Pavelková

2022

Water

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The construction of reservoirs has a major impact on the floodplain landscape, and their existence also affects land use in the hinterland. The aim of this article is to evaluate the influence of artificial lakes on changes in landscape use and transport networks; in this context, an assessment is provided of the significance of this anthropogenic activity as one of the drivers of landscape change. Old topographic maps and archival aerial photographs are used to analyze changes in the use of landscape and road networks, and these materials are complemented with the latest geographic data in digital form. Utilizing geographic information systems, we assessed the landscape changes and processes in the hinterland of those Czech Republic reservoirs that have an area of 100 ha or more. The results of the research show that landscape change processes are more intensive in the hinterland of the lakes than in the surrounding landscape. The predominant utility function of a reservoir emerged as a key factor in landscape use changes and ongoing processes. A different landscape use scenario can be observed in drinking water reservoirs, especially regarding the leisure and irrigation functions that dominate elsewhere. After the completion of reservoirs, the road and railway networks had an impact on, above all, the connection of the nearest villages in the hinterland of the lakes. The information that we found can be employed in projecting future changes in land use and road networks at newly planned dams.

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Regional contributions of climate change and human activities to altered flow of the Lancang-mekong river

Zhang,

Morovati,

Tian

et al. 2023

Journal of Hydrology: Regional Studies

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Quantifying spatiotemporal impacts of hydro-dams on land use/land cover changes in the Lower Mekong River Basin

Cited by 14 publications

References 65 publications

Determination of Spatial Pattern of Environmental Consequences of Dams in Watersheds

Determination of Spatial Pattern of Environmental Consequences of Dams in Watersheds

Water Reservoirs as a Driver of Anthropogenic Changes in Landscape and Transport Networks: The Czech Republic Experience

Regional contributions of climate change and human activities to altered flow of the Lancang-mekong river

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