Characterization of the impacts of hydro-dams on wetland inundations in Southeast Asia

Cho, Myung Sik; Qi, Jiaguo

doi:10.1016/j.scitotenv.2022.160941

Cited by 11 publications

(10 citation statements)

References 105 publications

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“…The different hydrological alteration in wetland areas was found by the location (e.g., upstream and downstream) and proximity of the wetlands to dams [14,[28][29][30]. For example, dams increased inundated areas of upstream wetlands and closely located downstream wetlands, but the inundation of downstream wetlands decreased in proportion to their distance from the dam [14]. This showed that the characteristics of hydrological alteration in wetlands can be used to determine the spatial pattern of dam impacts on watersheds.…”

Section: Introductionmentioning

confidence: 95%

“…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. The hydrological influences of dams were determined through watersheds, while the watersheds were studied using in situ measurements because dams disrupt the natural river flow in watershed scales [9,14]. To quantify the consequences, previous studies compared streamflow discharge from gauging stations before and after dam construction [15,16], isolated the dam impacts from climate variability [17], and modeled the influences of dams on the downstream streamflow [18].…”

Section: Introductionmentioning

confidence: 99%

“…Hydrologically connected wetlands with dams can represent the spatial patterns of the environmental impacts of dams on watersheds due to their hydrological linkage with dams at the watershed level [14]. Wetlands are sensitive to external pressure, such as hydrological changes [23], climate variability [24], and land use/land cover changes [25].…”

Section: Introductionmentioning

confidence: 99%

“…Changes in inundated areas of wetlands are one of the most significant hydrological alterations caused by dams [26,27]. The different hydrological alteration in wetland areas was found by the location (e.g., upstream and downstream) and proximity of the wetlands to dams [14,[28][29][30]. For example, dams increased inundated areas of upstream wetlands and closely located downstream wetlands, but the inundation of downstream wetlands decreased in proportion to their distance from the dam [14].…”

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: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

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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“…The major national plan for providing the water needed under the mentioned conditions has been to build dams and store water for different purposes. Although dams have some benefits, they can bring about negative changes in aquatic ecosystems and prevent their sustainable use [4]. These changes mainly include the undesirable alteration of hydrodynamic conditions in rivers, the accumulation of contaminants under the approximately steady-state conditions of the reservoirs, increase in the evaporation rate, and decrease in river flow due to river regulation/fragmentation [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Climate Change Impact on Inflow and Nutrient Loads to a Warm Monomictic Lake

Parmas,

Noori,

Hosseini

et al. 2023

Water

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This study analyses the impact of climate change on the inflows, sediment loads, and nutrient inputs to the Sabalan dam reservoir, a warm monomictic lake located northwest of Iran. For this purpose, the Soil and Water Assessment Tool (SWAT) was calibrated (2005–2018) and validated (2001–2004). Future climate-based data under the AR5 emission scenarios were obtained from the HadGEM2–ES general circulation model and then downscaled using the LARSWG 6.0. The tuned SWAT model was used to investigate the climate change impact on the hydrological processes and pollution loads to the Sabalan dam reservoir. Our findings based on the Nash–Sutcliffe efficiency coefficient and the coefficient of determination indicated an acceptable performance of the SWAT model in the simulation of inflows, sediment loads, and nutrient inputs to the reservoir. Inflow and sediment load to the reservoir will increase during the period of 2030–2070 compared to the base period (1998–2018). The annual total nitrogen (phosphorus) load to the reservoir will increase by 8.5% (9.4%), 7.3% (8.2%), and 5% (3.4%) under the emission scenarios of RCP2.6, RCP4.5, and RCP8.5, respectively. An increase in sediment loads and nutrient inputs to the Sabalan dam reservoir will significantly exacerbate the reservoir eutrophic condition, leading to water quality deterioration with acute consequences for the positive functions of the dam.

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Dynamic landscapes and the influence of human activities in the Yellow River Delta wetland region

Dou,

Guo,

Zhang

et al. 2023

Science of The Total Environment

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Characterization of the impacts of hydro-dams on wetland inundations in Southeast Asia

Cited by 11 publications

References 105 publications

Determination of Spatial Pattern of Environmental Consequences of Dams in Watersheds

Determination of Spatial Pattern of Environmental Consequences of Dams in Watersheds

Climate Change Impact on Inflow and Nutrient Loads to a Warm Monomictic Lake

Dynamic landscapes and the influence of human activities in the Yellow River Delta wetland region

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