scholarly journals Adapting to Variable Water Supply in the Truckee-Carson River System, Western USA

Water ◽  
2017 ◽  
Vol 9 (10) ◽  
pp. 768 ◽  
Author(s):  
Kelley Sterle ◽  
Loretta Singletary
Keyword(s):  
Water Supply ◽  
River System ◽  
Western Usa ◽  
Carson River ◽  
Variable Water

scholarly journals How Long Does a 15-Year Drought Last? On the Correlation of Rare Events

2019 ◽  
Vol 32 (5) ◽  
pp. 1345-1359 ◽  
Author(s):  
George Rhee ◽  
Jimmy Salazar ◽  
Corwin Grigg
Keyword(s):  
Water Supply ◽  
Tree Ring ◽  
Colorado River ◽  
River System ◽  
Past Century ◽  
Water Shortages ◽  
Tree Ring Data ◽  
Supply Problem ◽  
Quantitative Understanding ◽  
Streamflow Statistics

Abstract Communities reliant upon the Colorado River system are at risk of water shortages because of fluctuations of the river’s streamflows. The solution to the water supply problem for the Colorado River system lies within a quantitative understanding of these fluctuations during droughts. Streamflow data (direct and inferred) for the Colorado River extend back approximately 1200 years through the analysis of tree-ring records (Meko et al.; Woodhouse et al.). We further analyze these data using a mathematical model to present estimates for the future water supply of the Colorado River by comparing measured streamflows of the past century with the yearly tree-ring data of the Colorado River. We estimate that the Colorado River system’s reservoirs lack enough stored water reserves to last through the current drought, which has been ongoing since 2000. If true, it is essential to reevaluate the way water is used and stored for the Colorado River. The methods presented are relevant to any river system whose streamflow statistics are Gaussian.

scholarly journals Study on creation of water sources supplying the inner river system in Hanoi city with continuous flow for cleaning the aquatic environment

2018 ◽  
Vol 193 ◽  
pp. 02012
Author(s):  
Hue Huu Nguyen ◽  
Thanh Huu Nguyen
Keyword(s):  
Waste Water ◽  
Water Pollution ◽  
Water Supply ◽  
Aquatic Environment ◽  
River System ◽  
Supply System ◽  
Water Supply System ◽  
Current State ◽  
State Of Water ◽  
The One

Vietnam is currently facing major challenges from ongoing water pollution in urban rivers. In the city of Hanoi, the amount of domestic waste water, industrial waste water, and waste water from unprocessed trade villages are discharged directly into the rivers, which are the main causes of water pollution. The biggest problem now is how to deal with the current state of water pollution in the inner rivers of Hanoi with the focus on Day, Nhue, and To Lich river systems. This article presents the study to determine Route Works for a gravity based water supply system that provides continuous flows to these rivers. Then, the one-dimensional hydrodynamic model (HEC-RAS V4.1) is used as a basis for assessing the effectiveness of the solution. Through the results of the study, it was once again confirmed that the construction of a gravity based water supply system is feasible, both to improve the aquatic environment of the rivers and to ensure the supply of irrigation water for production.

Multilocational evaluation of biomass sorghum hybrids under two stand densities and variable water supply in Italy

2004 ◽  
Vol 20 (1) ◽  
pp. 3-9 ◽  
Author(s):  
E. Habyarimana ◽  
P. Bonardi ◽  
D. Laureti ◽  
V. Di Bari ◽  
S. Cosentino ◽  
...  
Keyword(s):  
Water Supply ◽  
Biomass Sorghum ◽  
Variable Water

scholarly journals Effect of Water Regime on the Sucrose-Enzyme Relationships of Sugarcane Desiccated with Paraquat

1969 ◽  
Vol 56 (2) ◽  
pp. 134-153
Author(s):  
Rafael Montalvo-Zapata ◽  
Alex G. Alexander
Keyword(s):  
Water Supply ◽  
Water Regime ◽  
High Water ◽  
Sand Culture ◽  
Mitochondrial Enzymes ◽  
Intermediate Water ◽  
Chemical Application ◽  
Storage Tissue ◽  
Water Regimes ◽  
Variable Water

Immature sugarcane was given variable-water regimes in sand culture and subsequently treated with a powerful desiccant, the bipyridylium herbicide Paraquat, applied as a 0.05-percent aqueous foliar spray. There were two objectives: (a) To evaluate the effects of water regime on sucroseenzyme relationships in desiccating sugarcane; and (b) to determine whether controlled water regimes could effectively modify Paraquat activity in sugarcane. Tissue samples were harvested for moisture, sugar and enzyme analyses at 1,3 and 9 days after Paraquat application. Low water supply (1 liter per day) reduced total fresh weights and stalk weights, and increased sucrose content of immature storage tissue. Paraquat significantly lowered total fresh weights, stalk weights, sheath moisture and leaf sucrose by the 9-day harvest. Desiccant action was generally more rapid within the low-water regime. High- and intermediate-water regimes tended to modify Paraquat activity at 1 or 3 days, but its ultimate effects were comparable regardless of water regime. No evidence was found to support the theory that desiccating cane accumulates water as a function of continued water absorption when transpiration has ceased. Acid invertase was suppressed by Paraquat, an effect consistent with earlier findings. The suppression was most severe in the low-water regime. Low-water supply significantly lowered invertase level but the response was not consistent at all harvests. Acid phosphatase and ATP-ase were severely repressed by Paraquat in leaves but not in immature storage tissue. An explanation was offered in terms of distinct chloroplast and mitochondrial enzymes rather than localized Paraquat action. For both enzymes the desiccant repression was significantly more severe in the high-water regime at 1 or 3 days, but water regime showed no effect at 9 days. Paraquat significantly increased ß-amylase in leaves (consistent with earlier studies), particularly within the high-water regime. In immature stem tissue ß-amylase was repressed by high water in Paraquat-free plants. Paraquat eliminated the water effect. Peroxidase was increased in storage tissue by Paraquat. This response was statistically significant only under conditions of low-water supply. It is concluded that variable water regimes can modify the rate of initial Paraquat activity in sugarcane; however, the ultimate effects of Paraquat will not be changed under conditions of thorough chemical application. Under field conditions of marginal chemical penetration, the plant's moisture status might play a more decisive role in determining the desiccant's effectiveness.

Corrigendum to: Trajectory river modelling – a decision-support tool to help manage multiple risks associated with planning around variable water resources

2020 ◽  
Vol 71 (8) ◽  
pp. 1040
Author(s):  
Mat Gilfedder ◽  
Geoff Podger ◽  
David W. Rassam ◽  
Dan Pagendam ◽  
Catherine J. Robinson
Keyword(s):  
River Flow ◽  
River System ◽  
Decision Support Tool ◽  
Resource Planning ◽  
Support Tool ◽  
System Models ◽  
Multiple Risks ◽  
Murray Darling Basin ◽  
River Modelling ◽  
Variable Water

The application of river-system models to inform water-resource planning and management is a growing global phenomenon. This requires models to be applied so that they are useful to water decision makers charged with setting targets that provide adequate water flows to sustain landholders and communities. This article examines why and how the innovative application of river-system models can facilitate interactions between water science and water management in Australia's Murray–Darling Basin (the Basin). A trajectory river-modelling method was applied to run multiple short historical climate sequences through a river-system model to provide historical probabilities. These can allow better assessment of the risks and impacts associated with stream flow and water availability. This method allows known historical variability to be presented, and produces relevant results for a 10–15-year water-sharing plan lifetime. The benefits were demonstrated in the Basin's Lachlan Catchment where modelled river-flow results demonstrated the increased variability between shorter 15-year sequences than for a single 114-year run. This approach highlighted the benefits of expressing modelling results as historical probabilities to inform short-term and strategic water-planning efforts.

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