Glacier changes and their impacts on the discharge in the past half-century in Tekes watershed, Central Asia

Xu, Bin; Lu, Zhixiang; Liu, Shiyin; Li, Jing; Xie, Jiping; Long, Aihua; Yin, Zhenliang; Zou, Songbing

doi:10.1016/j.pce.2015.03.003

Cited by 19 publications

(15 citation statements)

References 26 publications

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“…8 % in 1966-1975 to 7.8 % in 2000-2008. Using two land use data and two Chinese glacier inventories, the model could well reproduce streamflow. Xu et al (2015) Ili River DTVGM (multi-spatial data-based Distributed Time-Variant Gain Model) model Daily runoff correlated closely with snowmelt, suggesting a snowmelt module is indispensable.…”

Section: Ma and Cheng (2003)mentioning

confidence: 99%

Review article: Hydrological modeling in glacierized catchments of central Asia – status and challenges

Chen

Fang

et al. 2017

Hydrol. Earth Syst. Sci.

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Abstract. Meltwater from glacierized catchments is one of the most important water supplies in central Asia. Therefore, the effects of climate change on glaciers and snow cover will have increasingly significant consequences for runoff. Hydrological modeling has become an indispensable research approach to water resources management in large glacierized river basins, but there is a lack of focus in the modeling of glacial discharge. This paper reviews the status of hydrological modeling in glacierized catchments of central Asia, discussing the limitations of the available models and extrapolating these to future challenges and directions. After reviewing recent efforts, we conclude that the main sources of uncertainty in assessing the regional hydrological impacts of climate change are the unreliable and incomplete data sets and the lack of understanding of the hydrological regimes of glacierized catchments of central Asia. Runoff trends indicate a complex response to changes in climate. For future variation of water resources, it is essential to quantify the responses of hydrologic processes to both climate change and shrinking glaciers in glacierized catchments, and scientific focus should be on reducing uncertainties linked to these processes.

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Section: Ma and Cheng (2003)mentioning

confidence: 99%

Review article: Hydrological modeling in glacierized catchments of central Asia – status and challenges

Chen

Fang

et al. 2017

Hydrol. Earth Syst. Sci.

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“…The model was calibrated for the period from January 2003 to December 2008 and validated for the period from January 2009 to December 2014; the period from January 2000 to December 2002 was regarded as the warm-up period. The hydrologic calibration followed multi-temporal, multi-variable, multi-site principles and used the observed data, hydrological characteristics, and expert knowledge of the basin to improve the accuracy of the runoff simulation [60]. Parameter sensitivity was analysed by SWAT-CUP in the upper HRB.…”

Section: Model Calibration and Performancementioning

confidence: 99%

Runoff Simulation by SWAT Model Using High-Resolution Gridded Precipitation in the Upper Heihe River Basin, Northeastern Tibetan Plateau

Ruan

Zou

Yang

et al. 2017

Water

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Abstract:The scarcity and uneven distribution of precipitation stations in the inland river basins of the Northeastern Tibetan Plateau restrict the application of the distributed hydrological model and spatial analysis of water balance component characteristics. This study used the upper Heihe River Basin as a case study, and daily gridded precipitation data with 3 km resolution based on the spatial interpolation of gauged stations and a regional climate model were used to construct a soil and water assessment tool (SWAT) model. The aim was to validate the precision of high-resolution gridded precipitation for hydrological simulation in data-scarce regions; a scale transformation method was proposed by building virtual stations and calculating the lapse rate to overcome the defects of the SWAT model using traditional precipitation station data. The gridded precipitation was upscaled from the grid to the sub-basin scale to accurately represent sub-basin precipitation input data. A satisfactory runoff simulation was achieved, and the spatial variability of water balance components was analysed. Results show that the precipitation lapse rate ranges from 40 mm/km to 235 mm/km and decreases from the southeastern to the northwestern areas. The SWAT model achieves monthly runoff simulation compared with gauged runoff from 2000 to 2014; the determination coefficients are higher than 0.71, the Nash-Sutcliffe efficiencies are higher than 0.76, and the percentage bias is controlled within ±15%. Meadow and sparse vegetation are the major water yield landscapes, and the elevation band from 3500 m to 4500 m is the major water yield area. Precipitation and evapotranspiration present a slightly increasing trend, whereas water yield and soil water content present a slightly decreasing trend. This finding indicates that the high-resolution gridded precipitation data fully depict its spatial heterogeneity, and scale transformation significantly promotes the application of the distributed hydrological model in inland river basins. The spatial variability of water balance components can be quantified to provide references for the integrated assessment and management of basin water resources in data-scarce regions.

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“…The elevation of the study area ranges from 1,667 m to 5,008 m, with a mean elevation of 3,737 m. The basin outlet is monitored by the Yingluoxia hydrological station. Hydrological stations in Qilian and Zhamashike are situated in the east and west tributaries of the upper HRB, respectively (Lu et al, 2015). The flow of 10 these two tributaries joins the mainstream at the Huangzangsi and enters the basin outlet.…”

Section: Study Areamentioning

confidence: 99%

“…The 5 SWAT model can generate a large amount of sub-basin and relatively independent geographical area. Moreover, combining the studies on the optimal drainage area threshold for the upper HRB, the drainage area threshold was set at 50 km 2 (Lu et al, 2015). The SWAT model generated 97 sub-basins.…”

mentioning

confidence: 99%

Runoff simulation by SWAT model using high-resolution gridded precipitation in the upper Heihe River Basin, Northeastern Tibetan Plateau

Ruan

Zou

Cong

et al. 2016

Preprint

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Abstract. Precipitation stations are usually scarce and unevenly distributed in inland river basins, which restrict the application of the distributed hydrological model and spatial analysis of water balance component characteristics. This study regards the upper Heihe River Basin as a case, and daily gridded precipitation data with 3 km resolutions based on the spatial interpolation of gauged stations and the regional climate model is used to construct the soil and water assessment tool 15 (SWAT). This study aims to validate the superiority of high-resolution gridded precipitation for hydrological simulation in data scarce regions. A scale transformation method is proposed by building virtual stations and calculating the lapse rate to overcome the defects of the SWAT model using traditional precipitation station data. The gridded precipitation is upscale from the grid to the sub-basin scale and results in accurate representation of sub-basin precipitation input data. A satisfactory runoff simulation is achieved, and the spatial variability of the water balance components is analysed. Results show that the 20 precipitation lapse rate ranges from 40 mm/km to 235 mm/km and decreases from the southeastern to the northwestern areas; its changes trend is consistent with precipitation. The SWAT model achieves monthly runoff simulation compared with gauged runoff from 2000 to 2014; the determination coefficients are higher than 0.71, the Nash-Sutcliffe efficiencies are higher than 0.76 and the percent bias are controlled within ±15%. The meadow and sparse vegetation are the major water yield landscapes, and the elevation band at 3,500 m to 4,500 m is the major water yield area in this basin. Precipitation and 25 evapotranspiration presented a slightly increasing trend, whereas water yield and soil water content presented a slightly decreasing trend. This finding indicates that the high-resolution gridded precipitation data well depicts its spatial heterogeneity, and scale transformation significantly promotes the application of the distributed hydrological model in inland river basins. The spatial variability of water balance components can be quantified to provide references for the integrated assessment and management of basin water resources in data scarce regions. 30

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Glacier changes and their impacts on the discharge in the past half-century in Tekes watershed, Central Asia

Cited by 19 publications

References 26 publications

Review article: Hydrological modeling in glacierized catchments of central Asia – status and challenges

Review article: Hydrological modeling in glacierized catchments of central Asia – status and challenges

Runoff Simulation by SWAT Model Using High-Resolution Gridded Precipitation in the Upper Heihe River Basin, Northeastern Tibetan Plateau

Runoff simulation by SWAT model using high-resolution gridded precipitation in the upper Heihe River Basin, Northeastern Tibetan Plateau

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