PROPOSAL OF CRITERIA TO EVALUATE CLIMATE CHANGE IMPACTS ON FLOOD CONTROL AND WATER UTILIZATION FUNCTIONS OF DAMS

2018 ◽  
Vol 74 (5) ◽  
pp. I_1333-I_1338
Author(s):  
Hiroyuki KOJIMA ◽  
Gen NAGATANI ◽  
Makoto KURAHASHI ◽  
Ikuo KAWAMURA ◽  
Yoshinobu SATO ◽  
...  
Keyword(s):  
Climate Change ◽  
Flood Control ◽  
Climate Change Impacts ◽  
Water Utilization

PROPOSAL OF CRITERIA TO EVALUATE CLIMATE CHANGE AND RESERVOIR SEDIMENTATION IMPACTS ON FLOOD CONTROL AND WATER UTILIZATION FUNCTIONS OF DAMS

2019 ◽  
Vol 75 (2) ◽  
pp. I_91-I_96
Author(s):  
Hiroyuki KOJIMA ◽  
Gen NAGATANI ◽  
Ikuo KAWAMURA ◽  
Yuichi TANIWAKI ◽  
Makoto KURAHASHI ◽  
...  
Keyword(s):  
Climate Change ◽  
Flood Control ◽  
Reservoir Sedimentation ◽  
Water Utilization

scholarly journals Climate Change Impacts on Drought-Flood Abrupt Alternation and Water Quality in the Hetao Area, China

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 652 ◽  
Author(s):  
Yuheng Yang ◽  
Baisha Weng ◽  
Wuxia Bi ◽  
Ting Xu ◽  
Dengming Yan ◽  
...  
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Flood Control ◽  
Assessment Tool ◽  
Integrated Management ◽  
Climate Change Impacts ◽  
Model Soil ◽  
The Future ◽  
Increasing Temperature ◽  
Water Quality Deterioration

Drought-flood abrupt alternation (DFAA) is an extreme hydrological phenomenon caused by meteorological anomalies. To combat the climate change, the watershed integrated management model—Soil and Water Assessment Tool model (SWAT)—was used to simulate DFAA, total nitrogen (TN) and total phosphorus (TP) from 1961 to 2050, based on measured precipitation data in the Hetao area and the downscaled Representative Concentration Pathways (RCPs) climate scenarios. In the future, the increase in temperature and the increase in extreme precipitation will aggravate the pollution of water bodies. Results indicate that the risk of water quality exceeding the standard will increase when DFAA happens, and the risk of water quality exceeding the standard was the greatest in the case of drought-to-flood events. Results also indicate that, against the backdrop of increasing temperature and increasing precipitation in the future, the frequency of long-cycle and short-cycle drought-flood abrupt alternation index (LDFAI, SDFAI) in the Hetao area will continue to decrease, and the number of DFAA situations will decrease. However, the zone of high-frequency DFAA situations will move westward from the eastern Ulansuhai Nur Lake, continuing to pose a risk of water quality deterioration in that region. These results could provide a basis for flood control, drought resistance and pollution control in the Hetao and other areas.

Climate and energy justice along the Brahmaputra river in Northeast India

2021 ◽  
pp. 251484862110320
Author(s):  
Costanza Rampini
Keyword(s):  
Climate Change ◽  
Flood Control ◽  
Climate Change Impacts ◽  
Northeast India ◽  
Urban Centers ◽  
Brahmaputra River ◽  
Hydroelectric Project ◽  
Energy Justice ◽  
Under Construction ◽  
Downstream Communities

Recurrent summer floods along the Brahmaputra river and its tributaries are a major challenge for the people and state governments of Northeast India. While riverine communities in the region rely upon a variety of adaptation strategies to live with these destructive floods, climate change is expected to further exacerbate this challenge, as melting Himalayan glaciers and changes in the South Asian monsoon lead to an increase in the frequency of severe floods. At the same time, a multitude of new dams are under construction in the Brahmaputra river basin, to meet India’s growing energy demands. Though these dams could provide flood protection for downstream communities, political and economic factors have led dam-builders to prioritize hydroelectricity generation over flood control. Furthermore, hydroelectricity generated along the Brahmaputra is “evacuated” to distant urban centers, while rural dwellers in Northeast India suffer from high levels of energy poverty. Using the Ranganadi Hydroelectric Project in Arunachal Pradesh as a case study, this paper examines how, by changing the flood regime and undermining current adaptive strategies, large dams along the Brahmaputra are testing the capacity of downstream communities to live with summer floods. This work highlights the ways in which poor and vulnerable communities in Northeast India are forced to bear the costs of both climate change impacts and decarbonization efforts.

scholarly journals Indicators of Necessary Storages for Flood and Drought Management: Towards Global Maps

2016 ◽  
Author(s):  
Kuniyoshi Takeuchi ◽  
Muhammad Masood
Keyword(s):  
Climate Change ◽  
Spatial Distribution ◽  
Water Resources ◽  
Flood Control ◽  
Climate Change Impacts ◽  
Careful Study ◽  
Range Analysis ◽  
Drought Duration ◽  
Hydrological Simulation ◽  
Discharge Variation

Abstract. Storage is the only means to smooth out the discharge variation necessary to control hazards and utilize water resources. Necessary storage depends on the levels of discharge variation, required flood control and water use. The main methodologies to calculate necessary storage include mass curve method and simulation. The use of flood duration curve (FDC) and drought duration curve (DDC) that this paper presents is an alternative way that has considerable advantages over the others. The diagram of FDC-DDC serves as the classification indicator of basin hydrology and the FDC-DDC based estimates of necessary storages can be used for reservoir operation. The FDC-DDC based necessary storages pay an attention to the finite term hydrological variation rather than the asymptotic infinite memory of variation that Range analysis focuses. On the other hand the FDC-DDC focus on spatial distribution of necessary storages and try to find spatial rules of hydrological heterogeneity in necessary storages. For a case study, the Ganges-Brahmaputra-Meghna basin was selected and its spatial distribution of the FDC–DDC based necessary storages was calculated based on the discharge dataset obtained by hydrological simulation of the MRI-AGCM3.2S projections using the hydrological model BTOPMC developed at University of Yamanashi and ICHARM. The spatial distribution of necessary storages indicate the relative difficulty of managing the temporal variation of river discharges for human use at respective locality. The climate change impacts on the necessary storages were analysed and found the increase in difficulty of managing high flows and the general ease of managing low flows. But local differences were rather large that indicates the need of careful study to respond unique spatial structure of local discharge variation. The relation to catchment area was also analysed and found such regional heterogeneity diminishes into a basin average slowly in several 10,000 km2. A representative elementary area of necessary storages for discharge smoothing is a new concept that deserves for further study. A creation of global maps would be a useful challenge for assessment of current state of water resources, climate change impact on water resources and for study of hydrological heterogeneity and its scale effect.

Climate change impacts on crop yields in Ethiopia

2019 ◽  
Author(s):  
International Food Policy Research Institute (IFPRI)
Keyword(s):  
Climate Change ◽  
Crop Yields ◽  
Climate Change Impacts

CLIMATE CHANGE IMPACTS ON THE HYDROLOGICAL AND HYDROCHEMICAL CHARACTERISTICS OF THE NORTHERN CASPIAN

2020 ◽  
Vol 19 (6) ◽  
pp. 25-35
Author(s):  
Ostrovskaya Elena ◽  
◽  
Gavrilova Elena ◽  
Kurapov Alexey ◽  
Varnachkin Sergey ◽  
...  
Keyword(s):  
Climate Change ◽  
Climate Change Impacts ◽  
Hydrochemical Characteristics
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