Impacts of climate change and human activities on the flow regime of the dammed Lancang River in Southwest China

Han, Zhuo Rachel; Long, Di; Fang, Yu; Hou, Aizhong; Hong, Yang

doi:10.1016/j.jhydrol.2018.12.048

Cited by 121 publications

(82 citation statements)

References 41 publications

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“…In this stage, we used remotely sensed SWE (see section 2.2.2) that reflects the amount of water in snowpack as the calibration reference (Chen et al, 2017;P. Han et al, 2019a;Z. Han, et al, 2019b).…”

Section: Model Calibration 331 Developed Calibration Strategymentioning

confidence: 99%

Daily Continuous River Discharge Estimation for Ungauged Basins Using a Hydrologic Model Calibrated by Satellite Altimetry: Implications for the SWOT Mission

Huang

Long

et al. 2020

Water Resources Research

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The emergence of state‐of‐the‐art satellite altimetry has provided new prospects for integrating water surface elevation (water level) measurements with a hydrologic model for river discharge estimation, which is particularly suited for poorly gauged or ungauged basins. In this context, we explored the possibility of model calibration using Jason‐2‐derived water levels, followed by SWOT (the Surface Water and Ocean Topography mission)‐like data (the combination of Landsat 5/8‐derived at‐a‐section river widths and concurrent gauged water levels). Two types of empirical formulas designed specifically for altimetry‐derived water levels and the joint use of water levels and river widths, respectively, were used to derive discharge, which was integrated with a hydrologic model (CREST‐RS). Here we present results of estimating daily continuous river discharge in narrow rivers for the upper Brahmaputra River (UBR) and Lhasa River (LR) using the developed approach independent of in situ discharge measurements. Five scenarios were performed: (1) model calibration using the Jason‐2‐derived water levels and SWOT‐like data in the UBR (scenarios I–III) and (2) model calibration using the SWOT‐like data for the LR (scenarios IV–V). Results showed that model calibration using the Jason‐2‐derived water levels could provide reasonably well‐constrained parameters for discharge estimation, with the Nash‐Sutcliffe Efficiency coefficient (NSE) reaching 0.85 during 2003–2014. For the SWOT‐like data, the NSE reached 0.85 for the UBR and 0.75 for the LR. This study highlights the potential of performing model calibration using satellite altimetry and SWOT‐like observations, which paves the way to estimate river discharge for ungauged basins globally.

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Section: Model Calibration 331 Developed Calibration Strategymentioning

confidence: 99%

Daily Continuous River Discharge Estimation for Ungauged Basins Using a Hydrologic Model Calibrated by Satellite Altimetry: Implications for the SWOT Mission

Huang

Long

et al. 2020

Water Resources Research

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“…The HSR originates from the southern foot of the Tanggula Mountains, flowing from north to south through the TP and the downstream portion finally discharging to the Andaman Sea within the Indian Ocean (Long, Shen, et al, 2014). The HMR originates from Zadoi County on the TP, and the downstream portion terminates in the South China Sea (Z Han, Long, Fang, et al, 2019). The Yangtze and Huang (Yellow) Rivers are two major rivers in China.…”

Section: Study Areamentioning

confidence: 99%

Evapotranspiration Estimation for Tibetan Plateau Headwaters Using Conjoint Terrestrial and Atmospheric Water Balances and Multisource Remote Sensing

Long

Han

et al. 2019

Water Resources Research

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Satellite remote sensing combined with water balance calculations provides a promising approach to estimating evapotranspiration (ET), a critical variable in water‐energy exchange. Here we compare ET estimates from terrestrial and atmospheric water balances, multisource remote sensing (AVHRR, GLEAM, and MOD16), and a land surface model (GLDAS NOAH) for headwaters on the Tibetan Plateau (TP), that is, headwaters of the Brahmaputra (HBR), Salween (HSR), Mekong (HMR), Yangtze (HYR), and Huang (Yellow; HHR) Rivers, for the 2003–2012 period. Results show that (1) ET estimated from terrestrial and atmospheric water balances agrees closely in three basins (HMR, HYR, and HHR) but has large discrepancies in the other two basins (HBR and HSR), mainly caused by uncertainties in the terrestrial water balance; (2) agreement between various ET products and water balance‐derived ET baselines is highest for GLEAM in two basins (HMR and HYR) and GLDAS NOAH in another two basins (HSR and HHR); and (3) large discrepancies between water balance‐derived ET and all ET products are found in the most glacierized HBR, which may reflect the importance of sublimation in the ET process. The decadal mean ET based on water balance‐derived ET baselines is highest in the HHR (447 mm/year) and HSR (430 mm/year) and lowest in the HBR (238 mm/year), ranging from 51% to 78% of mean precipitation in the five TP headwaters. These findings have important implications for ET estimation on the TP headwaters, which greatly influences downstream water availability.

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“…Climate-and human-induced changes are affecting the quantity, quality, and timing of available freshwater (Magilligan and Nislow 2005;Barnett et al 2008;Han et al 2019;Khazaei et al 2019). Any disruption in these three parameters can lead to a catastrophic condition.…”

Section: Introductionmentioning

confidence: 99%

Changes in Hydrology of the Ganges Delta of Bangladesh and Corresponding Impacts on Water Resources

Murshed

Rahman

Kaluarachchi

2019

J American Water Resour Assoc

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The Ganges Delta in Bangladesh is an example of water‐related catastrophes in a major rural river basin where limitations in quantity, quality, and timing of available water are producing disastrous conditions. Water availability limitations are modifying the hydrologic characteristics especially when water allocation is controlled from the upstream Farakka Barrage. This study presents the changes and consequences in the hydrologic regime due to climate‐ and human‐induced stresses. Flow duration curves (FDCs), rainfall elasticity, and temperature sensitivity were used to assess the pre‐ and post‐barrage water flow patterns. Hydrologic and climate indices were computed to provide insight on hydro‐climatic variability and trend. Significant increases in temperature, evapotranspiration, hot days, heating, and cooling degree days indicate the region is heading toward a warmer climate. Moreover, increase in high‐intensity rainfall of short duration is making the region prone to extreme floods. FDCs depict a large reduction in river flows between pre‐ and post‐barrage periods, resulting in lower water storage capacity. The reduction in freshwater flow increased the extent and intensity of salinity intrusion. This freshwater scarcity is reducing livelihood options considerably and indirectly forcing population migration from the delta region. Understanding the causes and directions of hydrologic changes is essential to formulate improve water resources management in the region.

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Impacts of climate change and human activities on the flow regime of the dammed Lancang River in Southwest China

Cited by 121 publications

References 41 publications

Daily Continuous River Discharge Estimation for Ungauged Basins Using a Hydrologic Model Calibrated by Satellite Altimetry: Implications for the SWOT Mission

Daily Continuous River Discharge Estimation for Ungauged Basins Using a Hydrologic Model Calibrated by Satellite Altimetry: Implications for the SWOT Mission

Evapotranspiration Estimation for Tibetan Plateau Headwaters Using Conjoint Terrestrial and Atmospheric Water Balances and Multisource Remote Sensing

Changes in Hydrology of the Ganges Delta of Bangladesh and Corresponding Impacts on Water Resources

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