Response of Streamflow and Soil Erosion to Climate Change and Human Activities in Nam Rom River Basin, Northwest of Vietnam

Huong, Hoang Le; Environment, Gia Lam; Son, Ngo Thanh

doi:10.32526/ennrj.18.4.2020.39

Cited by 4 publications

(3 citation statements)

References 22 publications

(34 reference statements)

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“…Their results presented that increases in streamflow and sediment yield were observed in the period 1995-2005 due to conversions of forest land to crop land and urban area and reductions in streamflow and sediment load were observed during the period 2005-2010 due to reforestation [18]. Recently, Ngo and Nguyen conducted a similar study in the Nam Rom River Basin and reported that the reforestation reduced sediment yield during the period 1992-2015 [19]. In general, these studies have mainly focused on the influence of past LUC change and very few studies have conducted an inquiry into how future LUC change will affect streamflow and sediment load, which is essential for a robust understanding of the potential influences of LUC change on land and water resources in the region.…”

Section: Introductionmentioning

confidence: 95%

Impact of Future Land-Use/Cover Change on Streamflow and Sediment Load in the Be River Basin, Vietnam

Khôi

Loi

Sam

2021

Water

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Evaluation of the influence of land-use/cover (LUC) change on water and sediment fluxes from river basins is essential for proposing adaptation and mitigation strategies, but as of yet little information is available, especially in the tropics. For this motivation, the objective of this study was to assess the impact of scenarios of LUC change on streamflow and sediment load in the Be River Basin using the Dynamic Conversion of Land-Use and its Effects (Dyna-CLUE) model and the Soil and Water Assessment Tool (SWAT) model. The Dyna-CLUE and SWAT models were calibrated and validated against observed data in the period of 1980–2010. Three future LUC scenarios in 2030, 2050, and 2070 were generated utilizing the calibrated Dyna-CLUE model based on the historical conversion of forest land to agricultural land and urban area in the study region. Subsequently, the calibrated SWAT model was used to simulate the changes in streamflow and sediment load under these three future LUC scenarios. Results indicated that the annual streamflow and sediment load were estimated to be approximately 287.35 m3/s and 101.23 × 103 ton/month for the baseline period. Under the influence of future LUC scenarios, the annual streamflow and sediment load would experience increases of 0.19% to 0.45% and 0.22% to 0.68%, respectively. In addition, the 5th and 95th percentile values of streamflow and sediment load are predicted to rise in the context of future LUC change. The results achieved from the present study will support the managers and policy makers proposing appropriate solutions for sustainable water resources management and sediment control in the context of LUC change.

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Section: Introductionmentioning

confidence: 95%

Impact of Future Land-Use/Cover Change on Streamflow and Sediment Load in the Be River Basin, Vietnam

Khôi

Loi

Sam

2021

Water

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“…Population density in the tropics is projected to increase rapidly (e.g., Laurance et al, 2014), hence >50% of the world's population is expected to reside in the tropics by 2050. Land conversion for livestock and agriculture has intensified in the tropics since the "Green Revolution" in the second half of the 20th century (e.g., Evenson and Gollin, 2003;Le Huong and Thanh Son, 2020;Sinha et al, 2020;Alavez-Vargas et al, 2021;Jankowski et al, 2021), leading to increased sediment supply to some lowland lakes. Owens (2020) describes that greater sediment accumulation rates have become a threat to water security.…”

Section: Recent Sediment Accumulation Rates Increasing In Tropical Lo...mentioning

confidence: 99%

Sediment Infill of Tropical Floodplain Lakes: Rates, Controls, and Implications for Ecosystem Services

Yeager

Bergier

et al. 2022

Front. Earth Sci.

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Shallow lakes in tropical floodplains provide significant ecosystem services that can be altered by natural and anthropogenic forces. Despite their importance, little is known about the infill patterns and timescales and the magnitude of these changes in tropical floodplain lakes. Here, we present a global meta-analysis of sediment core-derived accumulation rate data for shallow floodplain lakes in tropical lowlands to quantify the timescales of basin infill. Environmental variables (e.g., sediment accumulation rates, bathymetry, surface area) were compiled from the literature or derived from remote sensing imagery, resulting in a database (n = 76 lakes) that includes various lake morphologies. Our results show an exponential increase in sediment accumulation rates in many of these lakes over the past 50 years, which we interpret as a response to growing human populations and deforestation, particularly in topographically steep watersheds with pronounced seasonal rainfall. Over centennial periods, tropical floodplain lakes accumulate sediment faster than many other extratropical lakes. The dataset suggests that complete infill of some tropical floodplain lakes will occur in as little as a few centuries. Our findings also reveal the critical environmental and human factors that influence sediment accumulation patterns and affect ecosystem services in shallow tropical floodplain lakes. These findings have important implications for water and sediment management in low latitude watersheds, many of which are located in densely populated and/or developing nations.

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“…In many cases, this represents an advance in the efficient use of resources. However, the unreasonable use of resources and the environment affects the process of changes in resources and the environment to varying degrees, causing or even controlling adverse gradients or mutations in resources and the environment, such as increased greenhouse gas emissions [13], river cutoff [14], and soil erosion [15]. Desertification is a more obvious example, and land and its related issues have always a racted great concern.…”

Section: Introductionmentioning

confidence: 99%

Spatial-Temporal Process of Land Use/Land Cover and Desertification in the Circum-Tarim Basin during 1990–2020

Cao,

Cui,

et al. 2024

Land

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The problem of desertification in the Tarim Basin, an area with a unique geography and climatic conditions, has received extensive research attention not only in China but also around the world. Between natural factors and human activities, the latter are considered the main cause of desertification, with the excessive use of land resources accelerating its risk. This study classified the degree of desertification into five types, no, light, moderate, severe, and extremely severe desertification, and focused on the spatio-temporal changes in LULC, desertification development, and their relationship in the Circum-Tarim Basin during the period of 1990–2020, and the results indicated the following. (1) Over the 30-year study period, farmland development was frequent in the basin. The total farmland area increased significantly by 1.40 × 104 km2, which resulted from the occupation of grassland (mainly low-covered and medium-covered grassland) and unused land (mainly saline–alkali land). (2) There was a general alleviation of the effects of desertification, but also local deterioration. The area of no-desertification land has significantly increased (an increase of 2.10 × 104 km2), and the degree of desertification has shifted significantly to adjacent lighter degrees, but the area of extremely severe desertification in certain regions has increased (an increase of 7.89 × 104 km2). (3) There was an inseparable relationship between LULC and desertification. Oasisization and desertification were two processes that interacted and were interrelated. There was an approximately 54.42% increase in no-desertification land area mainly occurring in the region where LULC types changed (Region II), although this area only accounted for 9.71% of the total area of the basin. There was an approximately 98.28% increase in the area of extremely severe desertification occurring where there were no changes in LULC types (Region I). Region II demonstrated the best effects of desertification prevention and control in the 30-year study period in the Circum-Tarim Basin. Land development and oasis expansion have led to concentrated water use, resulting in water scarcity in certain areas, which cannot support the needs of vegetation growth, thus aggravating the degradation. Hence, “adapting measures to local conditions, rational planning, zoning policies, precise prevention and control” will be the way forward for desertification control in the future in the Circum-Tarim Basin.

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Response of Streamflow and Soil Erosion to Climate Change and Human Activities in Nam Rom River Basin, Northwest of Vietnam

Cited by 4 publications

References 22 publications

Impact of Future Land-Use/Cover Change on Streamflow and Sediment Load in the Be River Basin, Vietnam

Impact of Future Land-Use/Cover Change on Streamflow and Sediment Load in the Be River Basin, Vietnam

Sediment Infill of Tropical Floodplain Lakes: Rates, Controls, and Implications for Ecosystem Services

Spatial-Temporal Process of Land Use/Land Cover and Desertification in the Circum-Tarim Basin during 1990–2020

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