Separation of the Impact of Landuse/Landcover Change and Climate Change on Runoff in the Upstream Area of the Yangtze River, China

Ahmed, Naveed; Wang, Genxu; Booij, Martijn J.; Sun, Xiangyang; Hussain, Fiaz; Nabi, Ghulam

doi:10.1007/s11269-021-03021-z

Cited by 47 publications

(22 citation statements)

References 62 publications

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“…Ensuring land management systems that maintain land cover is critical to sustaining human livelihoods in Africa [58]. LULC variation is one of the important factors affecting runoff in high-altitude catchment areas, which is of great significance for sustainable management and ecological development of water resources [59]. Therefore, the accuracy of land cover data will affect the indicators corresponding to the sustainable development goals [60,61].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Global Land Use–Land Cover Data Products in Guangxi, China

Qiu

Jia

et al. 2023

Remote Sensing

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Land use–land cover (LULC) is an important feature for ecological environment research, land resource management and evaluation. Although global high-resolution LULC data sets are booming, their regional performances were still evaluated in limited regions. To demonstrate the local applicability of global LULC data products, six emerging LULC data products were evaluated and compared in Guangxi, China. The six products used are European Space Agency GlobCover (ESAGC), ESRI Land Use–Land Cover (ESRI–LULC), Finer Resolution Observation and Monitoring of Global Land Cover (FROM–GLC), the China Land Cover Dataset (CLCD), the Global Land Cover product with Fine Classification System at 30 m (GLC_FCS30) and GlobeLand30 (GLC30). Reference data were obtained from the local government statistical yearbook and high-resolution remote sensing images on Google Earth. The results showed that CLCD, ESRI–LULC and GLC30 were found to agree well with the forest reference data, with the highest correlation coefficient of 0.999. For the cropland areas, GLC30, CLCD and ESAGC agreed well with the reference data, and the highest correlation coefficient was 0.957. Combined with the comparison with the high-resolution images obtained by Google Earth, we finally concluded that ESAGC, CLCD and GLC30 can best represent the LULCs in Guangxi. Furthermore, the spatial consistency analysis showed that three or more products identified the same LULC type as high as 96.98% of the area. We suggest that majority voting might be applied to global LULC products to provide fused products with better performances on a regional or local scale to avoid the error caused by a single data product.

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Section: Discussionmentioning

confidence: 99%

Evaluation of Global Land Use–Land Cover Data Products in Guangxi, China

Qiu

Jia

et al. 2023

Remote Sensing

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“…The average elevation of YRSR is 4500 m above sea level, and it is located between longitudes 90 50 N. The YRSR catchment area is 137,000 km 2 , which is 7.6% of the total area of the Yangtze River Basin and it contributed 20% to the total volume of water of Yangtze River Basin. The dominant land-cover types are natural forests, glaciers, wetlands, natural lakes, and permanently and seasonally frozen grounds [42][43][44][45][46][47]. The catchment area's climate is subtropical monsoon, and historical records showed that it has been getting warmer since 1989 due to an increase in temperature [41].…”

Section: Catchment Areamentioning

confidence: 99%

Attribution of Changes in Streamflow to Climate Change and Land Cover Change in Yangtze River Source Region, China

Ahmed

Wang

Lü

et al. 2022

Water

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The quantitative attribution of changes in streamflow to climate change (CC) and land cover change (LCC) for the Yangtze River Source Region (YRSR), China, was assessed. We used a combination of the SWAT model along with the statistical technique one factor at a time (OFAT) and innovative trend analysis (ITA) to achieve the study objectives. The climate and hydrology data from 1961 to 2016 and land-cover maps of 5 years’ difference from 1985 to 2015 were used. The model was calibrated (1964–1989) using a land-cover map of 1985 and validated for 1990–2016. This validated model was further validated for all other land-cover maps used in this study. The SWAT model simulation showed that streamflow had been significantly influenced by CC compared to LCC using land-cover maps of 1985–1990, 1990–1995. However, the SWAT model simulations did not result in further changes in streamflow for land cover maps of 2000–2005, 2005–2010, and 2010–2015 because there have not been any significant changes in land cover after 2000 while the main contributing factor was climate change. The SWAT model simulations showed that the main driver of changes in streamflow in the Yangtze River Source Region is climate change. This study shows that the individual impacts are more critical than combined impacts for designing hydraulic structures, water resources planning and management, and decision-making policies at the regional/basin scale.

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“…According to Pruski et al (2015) and Yoon et al (2010), pollutants accumulate in urban basins during dry weather, being produced not only by human activity but also by atmospheric deposition. The first rapid contribution when rain occurs after a period of drought consists of removing pollutants from impermeable surfaces, providing them highly concentrated in wastewater (Ahmed et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Light Rain Characterization in Piracicaba, São Paulo State, Brazil

Johanson¹,

Farias-Ramirez²,

Jacomazzi³

et al. 2023

Eng. Agríc.

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The disorderly soil occupation without the necessary conservationist practices leads to impacts on the local hydrology and induces the pollution of water resources. This pollution may come from more urbanized areas due to the amount of pollutants drained during the rains. Even moderate precipitations constitute one of the main factors that define pollutant runoff on the surface. These rains have recently been called light rains. Light rains have a lower precipitation height and a higher frequency compared to classic rains of drainage projects, being necessary to define them according to patterns of rain frequency for each region. This study aimed to characterize light rain in the municipality of Piracicaba to establish statistical standards for the frequency of certain precipitation heights. A database provided by the ESALQ/USP automatic weather station, which provides precipitation measurements every 15 minutes, was used in the present study. Light rain heights reached 40.3, 41.4, and 42.7 mm for 100, 90, or 80% frequencies, respectively, which implies the use of return periods of 1.00, 1.11, and 1.25 years, respectively.

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Separation of the Impact of Landuse/Landcover Change and Climate Change on Runoff in the Upstream Area of the Yangtze River, China

Cited by 47 publications

References 62 publications

Evaluation of Global Land Use–Land Cover Data Products in Guangxi, China

Evaluation of Global Land Use–Land Cover Data Products in Guangxi, China

Attribution of Changes in Streamflow to Climate Change and Land Cover Change in Yangtze River Source Region, China

Light Rain Characterization in Piracicaba, São Paulo State, Brazil

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