scholarly journals Assessment of climate change impact on water availability in the upper Dong Nai River Basin, Vietnam

2021 ◽  
Author(s):  
D. N. Khoi ◽  
V. T. Nguyen ◽  
T. T. Sam ◽  
N. T. H. Mai ◽  
N. D. Vuong ◽  
...  
Keyword(s):  
Climate Change ◽  
River Basin ◽  
Water Availability ◽  
Climate Change Impact ◽  
River Discharge ◽  
Water Shortage ◽  
Study Region ◽  
The Future ◽  
Change Impact ◽  
Impacts Of Climate Change

Abstract On a global scale, climate change is projected to have detrimental impacts on water availability. This situation will become more severe owing to accumulated impacts of climate change and anthropogenic activities. This study aims to investigate climate change impact on water availability in the upper Dong Nai River Basin using the Soil and Water Assessment Tool (SWAT) and Water Evaluation and Planning (WEAP) models. Future rainfall scenarios were downscaled from five different general circulation models under RCP4.5 and RCP8.5 using the Long Ashton Research Station Weather Generator (LARS-WG) tool. Under the climate change impact, annual river discharge in the study region is generally projected to have upward trends in the future, except for the near-future period of 2030s under RCP4.5. In addition, dry-seasonal river discharge is expected to be increased in the future. Considering the baseline condition of water use, there was an annual water shortage of approximately 32.9 × 103 m3, which mostly occurred in the dry season from January to March. Climate change may reduce the water shortage in the study region ranging from 7.0 to 30.1% in the future. Under the combined impacts of climate change and increasing water demand, the water shortage will vary from −18.6 to 6.0% in the future. The results can provide valuable insights to implement appropriate future water resources planning and management in the study region.

scholarly journals Water resources change in response to climate change in Changjiang River basin

2010 ◽  
Vol 7 (3) ◽  
pp. 3159-3188 ◽  
Author(s):  
Y. Huang ◽  
W. F. Yang ◽  
L. Chen
Keyword(s):  
Climate Change ◽  
Water Resources ◽  
River Basin ◽  
Climate Change Impact ◽  
Global Climate ◽  
Yangtze River Basin ◽  
Changjiang River ◽  
Runoff Change ◽  
The Future ◽  
Change Impact

Abstract. Doubtlessly, global climate change and its impacts have caught increasing attention from all sectors of the society world-widely. Among all those affected aspects, hydrological circle has been found rather sensitive to climate change. Climate change, either as the result or as the driving-force, has intensified the uneven distribution of water resources in the Changjiang (Yangtze) River basin, China. In turn, drought and flooding problems have been aggravated which has brought new challenges to current hydraulic works such as dike or reservoirs which were designed and constructed based on the historical hydrological characteristics, yet has been significantly changed due to climate change impact. Thus, it is necessary to consider the climate change impacts in basin planning and water resources management, currently and in the future. To serve such purpose, research has been carried out on climate change impact on water resources (and hydrological circle) in Changjiang River. The paper presents the main findings of the research, including main findings from analysis of historical hydro-meteorological data in Changjiang River, and runoff change trends in the future using temperature and precipitation predictions calculated based on different emission scenarios of the 24 Global Climate Modes (GCMs) which has been used in the 4th IPCC assessment report. In this research, two types of macro-scope statistical and hydrological models were developed to simulate runoff prediction. Concerning the change trends obtained from the historical data and the projection from GCMs results, the trend of changes in water resources impacted by climate change was analyzed for Changjiang River. Uncertainty of using the models and data were as well analyzed.

scholarly journals Appropriateness of Potential Evapotranspiration Models for Climate Change Impact Analysis in Yarlung Zangbo River Basin, China

Atmosphere ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 453 ◽  
Author(s):  
Pan ◽  
Xu ◽  
Xuan ◽  
Gu ◽  
Bai
Keyword(s):  
Climate Change ◽  
River Basin ◽  
Climate Change Impact ◽  
Impact Analysis ◽  
Potential Evapotranspiration ◽  
Global Climate Models ◽  
Historical Period ◽  
Yarlung Zangbo River ◽  
The Future ◽  
Change Impact

Evapotranspiration (ET) is an important element in the water and energy cycle. Potential evapotranspiration (PET) is an important measurement of ET. Its accuracy has significant influence on agricultural water management, irrigation planning, and hydrological modelling. However, whether current PET models are applicable under climate change or not, is still a question. In this study, five frequently used PET models were chosen, including one combination model (the FAO Penman-Monteith model, FAO-PM), two temperature-based models (the Blaney-Criddle and the Hargreaves models) and two radiation-based models (the Makkink and the Priestley-Taylor models), to estimate their appropriateness in the historical and future periods under climate change impact on the Yarlung Zangbo river basin, China. Bias correction methods were not only applied to the temperature output of Global Climate Models (GCMs), but also for radiation, humidity, and wind speed. It was demonstrated that the results from the Blaney-Criddle and Makkink models provided better agreement with the PET obtained by the FAO-PM model in the historical period. In the future period, monthly PET estimated by all five models show positive trends. The changes of PET under RCP8.5 are much higher than under RCP2.6. The radiation-based models show better appropriateness than the temperature-based models in the future, as the root mean square error (RMSE) value of the former models is almost half of the latter models. The radiation-based models are recommended for use to estimate PET under climate change in the Yarlung Zangbo river basin.

scholarly journals Modeling the future impacts of climate change on water availability in the Karnali River Basin of Nepal Himalaya

2020 ◽  
Vol 185 ◽  
pp. 109430 ◽  
Author(s):  
Piyush Dahal ◽  
Madan Lall Shrestha ◽  
Jeeban Panthi ◽  
Dhiraj Pradhananga
Keyword(s):  
Climate Change ◽  
River Basin ◽  
Water Availability ◽  
Nepal Himalaya ◽  
The Future ◽  
Impacts Of Climate Change

scholarly journals Land Cover and Climate Change Impact on River Discharge: Case Study of Upper Citarum River Basin

2018 ◽  
Vol 50 (3) ◽  
pp. 364-381 ◽  
Author(s):  
Arno Adi Kuntoro ◽  
◽  
Muhammad Cahyono ◽  
Edy Anto Soentoro ◽  
◽  
...  
Keyword(s):  
Climate Change ◽  
Land Cover ◽  
River Basin ◽  
Climate Change Impact ◽  
River Discharge ◽  
Change Impact

scholarly journals Modeling the Impact of Climate Change on Water Availability in the Zarrine River Basin and Inflow to the Boukan Dam, Iran

Climate ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 51 ◽  
Author(s):  
Farzad Emami ◽  
Manfred Koch
Keyword(s):  
Climate Change ◽  
River Basin ◽  
Water Availability ◽  
Water Shortage ◽  
Water Yield ◽  
Climate Scenarios ◽  
Lake Urmia ◽  
Precipitation Decrease ◽  
The Future ◽  
The Impact

The impacts of climate change on the water availability of Zarrine River Basin (ZRB), the headwater of Lake Urmia, in western Iran, with the Boukan Dam, are simulated under various climate scenarios up to year 2029, using the SWAT hydrological model. The latter is driven by meteorological variables predicted from MPI-ESM-LR-GCM (precipitation) and CanESM2-GCM (temperature) GCM models with RCP 2.6, RCP 4.5 and RCP 8.5 climate scenarios, and downscaled with Quantile Mapping (QM) bias-correction and SDSM, respectively. From two variants of QM employed, the Empirical-CDF-QM model decreased the biases of raw GCM- precipitation predictors particularly strongly. SWAT was then calibrated and validated with historical (1981–2011) ZR-streamflow, using the SWAT-CUP model. The subsequent SWAT-simulations for the future period 2012–2029 indicate that the predicted climate change for all RCPs will lead to a reduction of the inflow to Boukan Dam as well as of the overall water yield of ZRB, mainly due to a 23–35% future precipitation reduction, with a concomitant reduction of the groundwater baseflow to the main channel. Nevertheless, the future runoff-coefficient shows a 3%, 2% and 1% increase, as the −2% to −26% decrease of the surface runoff is overcompensated by the named precipitation decrease. In summary, based on these predictions, together with the expecting increase of demands due to the agricultural and other developments, the ZRB is likely to face a water shortage in the near future as the water yield will decrease by −17% to −39%, unless some adaptation plans are implemented for a better management of water resources.

Assessment the climate change impact on the future evapotranspiration and flows from a semi-arid environment

2020 ◽  
Vol 13 (2) ◽  
Author(s):  
Salah Ouhamdouch ◽  
Mohammed Bahir ◽  
Driss Ouazar ◽  
Abdelmalek Goumih ◽  
Kamel Zouari
Keyword(s):  
Climate Change ◽  
Climate Change Impact ◽  
Arid Environment ◽  
The Future ◽  
Change Impact ◽  
Semi Arid

scholarly journals CLIMATE CHANGE IMPACT STUDY ON FLOOD RISK IN LOWER WEST RAPTI RIVER BASIN USING MRI-AGCM OUTPUTS

2013 ◽  
Vol 69 (4) ◽  
pp. I_451-I_456
Author(s):  
Edangodage D.P. PERERA ◽  
Akiko HIROE ◽  
Kazuhiko FUKAMI ◽  
Toshiya UENOYAMA ◽  
Shigenobu TANAKA
Keyword(s):  
Climate Change ◽  
River Basin ◽  
Flood Risk ◽  
Climate Change Impact ◽  
Impact Study ◽  
Change Impact ◽  
Climate Change Impact Study
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