scholarly journals Semiarid Riparian Vegetation Water Demand and Its Influence to Compute the Sonora River Basin Water Availability

10.5772/14771 ◽  
2011 ◽  
Author(s):  
Ramos J. ◽  
Gonzalez F.J. ◽  
Marrufo L. ◽  
Dominguez R.
Keyword(s):  
River Basin ◽  
Water Availability ◽  
Water Demand ◽  
Riparian Vegetation ◽  
Basin Water ◽  
Vegetation Water Demand ◽  
Vegetation Water

scholarly journals Reviving the “Ganges Water Machine”: where and how much?

2017 ◽  
Vol 21 (5) ◽  
pp. 2545-2557 ◽  
Author(s):  
Lal Muthuwatta ◽  
Upali A. Amarasinghe ◽  
Aditya Sood ◽  
Lagudu Surinaidu
Keyword(s):  
Groundwater Recharge ◽  
Water Availability ◽  
Water Demand ◽  
Assessment Tool ◽  
Monsoon Season ◽  
Dry Season ◽  
Ganges River ◽  
Water Shortages ◽  
Basin Water ◽  
The Ganges

Abstract. Runoff generated in the monsoon months in the upstream parts of the Ganges River basin (GRB) contributes substantially to downstream floods, while water shortages in the dry months affect agricultural production in the basin. This paper examines the potential for subsurface storage (SSS) in the Ganges basin to mitigate floods in the downstream areas and increase the availability of water during drier months. The Soil and Water Assessment Tool (SWAT) is used to estimate sub-basin water availability. The water availability estimated is then compared with the sub-basin-wise unmet water demand for agriculture. Hydrological analysis reveals that some of the unmet water demand in the sub-basin can be met provided it is possible to capture the runoff in sub-surface storage during the monsoon season (June to September). Some of the groundwater recharge is returned to the stream as baseflow and has the potential to increase dry season river flows. To examine the impacts of groundwater recharge on flood inundation and flows in the dry season (October to May), two groundwater recharge scenarios are tested in the Ramganga sub-basin. Increasing groundwater recharge by 35 and 65 % of the current level would increase the baseflow during the dry season by 1.46 billion m3 (34.5 % of the baseline) and 3.01 billion m3 (71.3 % of the baseline), respectively. Analysis of pumping scenarios indicates that 80 000 to 112 000 ha of additional wheat area can be irrigated in the Ramganga sub-basin by additional SSS without reducing the current baseflow volumes. Augmenting SSS reduces the peak flow and flood inundated areas in Ramganga (by up to 13.0 % for the 65 % scenario compared to the baseline), indicating the effectiveness of SSS in reducing areas inundated under floods in the sub-basin. However, this may not be sufficient to effectively control the flood in the downstream areas of the GRB, such as in the state of Bihar (prone to floods), which receives a total flow of 277 billion m3 from upstream sub-basins.

scholarly journals Adaptive optimal allocation of water resources response to future water availability and water demand in the Han River basin, China

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jing Tian ◽  
Shenglian Guo ◽  
Lele Deng ◽  
Jiabo Yin ◽  
Zhengke Pan ◽  
...  
Keyword(s):  
Global Warming ◽  
Water Resources ◽  
Water Supply ◽  
River Basin ◽  
Water Availability ◽  
Water Demand ◽  
Optimal Allocation ◽  
Anthropogenic Changes ◽  
Han River ◽  
Han River Basin

AbstractGlobal warming and anthropogenic changes can result in the heterogeneity of water availability in the spatiotemporal scale, which will further affect the allocation of water resources. A lot of researches have been devoted to examining the responses of water availability to global warming while neglected future anthropogenic changes. What’s more, only a few studies have investigated the response of optimal allocation of water resources to the projected climate and anthropogenic changes. In this study, a cascade model chain is developed to evaluate the impacts of projected climate change and human activities on optimal allocation of water resources. Firstly, a large set of global climate models (GCMs) associated with the Daily Bias Correction (DBC) method are employed to project future climate scenarios, while the Cellular Automaton–Markov (CA–Markov) model is used to project future Land Use/Cover Change (LUCC) scenarios. Then the runoff simulation is based on the Soil and Water Assessment Tool (SWAT) hydrological model with necessary inputs under the future conditions. Finally, the optimal water resources allocation model is established based on the evaluation of water supply and water demand. The Han River basin in China was selected as a case study. The results show that: (1) the annual runoff indicates an increasing trend in the future in contrast with the base period, while the ascending rate of the basin under RCP 4.5 is 4.47%; (2) a nonlinear relationship has been identified between the optimal allocation of water resources and water availability, while a linear association exists between the former and water demand; (3) increased water supply are needed in the water donor area, the middle and lower reaches should be supplemented with 4.495 billion m3 water in 2030. This study provides an example of a management template for guiding the allocation of water resources, and improves understandings of the assessments of water availability and demand at a regional or national scale.

scholarly journals Infrastructure sufficiency in meeting water demand under climate-induced socio-hydrological transition in the urbanizing Capibaribe River basin – Brazil

2014 ◽  
Vol 18 (9) ◽  
pp. 3449-3459 ◽  
Author(s):  
A. Ribeiro Neto ◽  
C. A. Scott ◽  
E. A. Lima ◽  
S. M. G. L. Montenegro ◽  
J. A. Cirilo
Keyword(s):  
River Basin ◽  
Water Availability ◽  
Water Demand ◽  
Positive Impact ◽  
Adaptive Responses ◽  
Water Demands ◽  
Physics Ensemble ◽  
Hadley Centre ◽  
Ipcc Sres ◽  
Changes Over Time

Abstract. Water availability for a range of human uses will increasingly be affected by climate change, especially in the arid and semiarid tropics. The main objective of this study is to evaluate the infrastructure sufficiency in meeting water demand under climate-induced socio-hydrological transition in the Capibaribe River basin (CRB). The basin has experienced spatial and sectoral (agriculture-to-urban) reconfiguration of water demands. Human settlements that were once dispersed, relying on intermittent sources of surface water, are now larger and more spatially concentrated, which increases water-scarcity effects. Based on the application of linked hydrologic and water-resources models using precipitation and temperature projections of the IPCC SRES (Special Report: Emissions Scenarios) A1B scenario, a reduction in rainfall of 26.0% translated to streamflow reduction of 60.0%. We used simulations from four members of the HadCM3 (UK Met Office Hadley Centre) perturbed physics ensemble, in which a single model structure is used and perturbations are introduced to the physical parameterization schemes in the model (Chou et al., 2012). We considered that the change of the water availability in the basin in the future scenarios must drive the water management and the development of adaptation strategies that will manage the water demand. Several adaptive responses are considered, including water-loss reductions, wastewater collection and reuse, and rainwater collection cisterns, which together have potential to reduce future water demand by 23.0%. This study demonstrates the vulnerabilities of the infrastructure system during socio-hydrological transition in response to hydroclimatic and demand variabilities in the CRB and also indicates the differential spatial impacts and vulnerability of multiple uses of water to changes over time. The simulations showed that the measures proposed and the water from interbasin transfer project of the São Francisco River had a positive impact over the water supply in the basin, mainly for human use. Industry and irrigation will suffer impact unless other measures are implemented for demand control.

scholarly journals Dealing with variability in water availability: the case of the Verde Grande River basin, Brazil

2014 ◽  
Vol 364 ◽  
pp. 176-181
Author(s):  
B. Collischonn ◽  
A. V. Lopes ◽  
A. R. Pante
Keyword(s):  
River Basin ◽  
Water Use ◽  
Water Availability ◽  
Water Demand ◽  
Management Strategy ◽  
Water Shortages ◽  
Water Users ◽  
Current Water ◽  
Managing Risk ◽  
Semi Arid Region

Abstract. This paper presents a water resources management strategy developed by the Brazilian National Water Agency (ANA) to cope with the conflicts between water users in the Verde Grande River basin, located at the southern border of the Brazilian semi-arid region. The basin is dominated by water-demanding fruit irrigation agriculture, which has grown significantly and without adequate water use control, over the last 30 years. The current water demand for irrigation exceeds water availability (understood as a 95 % percentile of the flow duration curve) in a ratio of three to one, meaning that downstream water users are experiencing more frequent water shortages than upstream ones. The management strategy implemented in 2008 has the objective of equalizing risk for all water users and consists of a set of rules designed to restrict water withdrawals according to current river water level (indicative of water availability) and water demand. Under that rule, larger farmers have proportionally larger reductions in water use, preserving small subsistence irrigators. Moreover, dry season streamflow is forecasted at strategic points by the end of every rainy season, providing evaluation of shortage risk. Thus, water users are informed about the forecasts and corresponding restrictions well in advance, allowing for anticipated planning of irrigated areas and practices. In order to enforce restriction rules, water meters were installed in all larger water users and inefficient farmers were obligated to improve their irrigation systems’ performance. Finally, increases in irrigated area are only allowed in the case of annual crops and during months of higher water availability (November to June). The strategy differs from convectional approached based only on water use priority and has been successful in dealing with natural variability of water availability, allowing more water to be used in wet years and managing risk in an isonomic manner during dry years.

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