scholarly journals Analysis of the Water Demand-Supply Gap and Scarcity Index in Lower Amu Darya River Basin, Central Asia

2022 ◽  
Vol 19 (2) ◽  
pp. 743
Author(s):  
Zheng Wang ◽  
Yue Huang ◽  
Tie Liu ◽  
Chanjuan Zan ◽  
Yunan Ling ◽  
...  
Keyword(s):  
Water Resources ◽  
Water Supply ◽  
Water Scarcity ◽  
Water Demand ◽  
Supply And Demand ◽  
Aral Sea ◽  
Amu Darya ◽  
The Status ◽  
Water Supply And Demand ◽  
Amu Darya River

Lower reaches of the Amu Darya River Basin (LADB) is one of the typical regions which is facing the problem of water shortage in Central Asia. During the past decades, water resources demand far exceeds that supplied by the mainstream of the Amu Darya River, and has resulted in a continuous decrease in the amount of water flowing into the Aral Sea. Clarifying the dynamic relationship between the water supply and demand is important for the optimal allocation and sustainable management of regional water resources. In this study, the relationship and its variations between the water supply and demand in the LADB from the 1970s to 2010s were analyzed by detailed calculation of multi-users water demand and multi-sources water supply, and the water scarcity indices were used for evaluating the status of water resources utilization. The results indicated that (1) during the past 50 years, the average total water supply (TWS) was 271.88 × 108 m3/y, and the average total water demand (TWD) was 467.85 × 108 m3/y; both the volume of water supply and demand was decreased in the LADB, with rates of −1.87 × 108 m3/y and −15.59 × 108 m3/y. (2) percentages of the rainfall in TWS were increased due to the decrease of inflow from the Amu Darya River; percentage of agriculture water demand was increased obviously, from 11.04% in the 1970s to 44.34% in 2010s, and the water demand from ecological sector reduced because of the Aral Sea shrinking. (3) the supply and demand of water resources of the LADB were generally in an unbalanced state, and water demand exceeded water supply except in the 2010s; the water scarcity index decreased from 2.69 to 0.94, indicating the status changed from awful to serious water scarcity. A vulnerable balanced state has been reached in the region, and that water shortages remain serious in the future, which requires special attention to the decision-makers of the authority.

scholarly journals The optimal allocation of water resources oriented to prioritizing ecological needs using multiple schemes in the Shaying River Basin (Henan Section), China

2021 ◽  
Author(s):  
Hang Li ◽  
Xiao-Ning Qu ◽  
Jie Tao ◽  
Chang-Hong Hu ◽  
Qi-Ting Zuo
Keyword(s):  
Water Resources ◽  
Water Supply ◽  
River Basin ◽  
Water Conservation ◽  
Water Demand ◽  
Optimal Allocation ◽  
Supply And Demand ◽  
Allocation Model ◽  
Water Supply And Demand ◽  
Ecological Objectives

Abstract China is actively exploring water resources management considering ecological priorities. The Shaying River Basin (Henan Section) serves as an important grain production base in China. However, conflicts for water between humans and the environment are becoming increasingly prominent. The present study analyzed the optimal allocation of water while considering ecological priorities in the Shaying River Basin (Henan Section). The ecological water demand was calculated by the Tennant and the representative station methods; then, based on the predicted water supply and demand in 2030, an optimal allocation model was established, giving priority to meeting ecological objectives while including social and comprehensive economic benefit objectives. After solving the model, the optimal results of three established schemes were obtained. This revealed that scheme 1 and scheme 2 failed to satisfy the water demand of the study area in 2030 by only the current conditions and strengthening water conservation, respectively. Scheme 3 was the best scheme, which could balance the water supply and demand by adding new water supply based on strengthening water conservation and maximizing the benefits. Therefore, the actual water allocation in 2030 is forecast to be 7.514 billion (7.514 × 109) m3. This study could help basin water management departments deal with water use and supply.

Assessing Relations between Water Supply and Demand in the Odra and Morava River Basins/ Posouzení Vazby Vodárenských Zdrojů A Nároků Na Vodu V Oblastech Povodí Odry A Moravy

2012 ◽  
Vol 58 (4) ◽  
pp. 41-48
Author(s):  
Jan Thomas ◽  
Miroslav Kyncl ◽  
Silvie Langarová
Keyword(s):  
Drinking Water ◽  
Water Resources ◽  
Water Supply ◽  
Water Demand ◽  
Supply And Demand ◽  
River Basins ◽  
Climatic Changes ◽  
Water Supply And Demand ◽  
Morava River ◽  
The Given

Abstract Periods of drought represent a serious problem in the management of water resources. Currently used climatic models assume the onset of major climatic changes and periods of drought. Irrespective of whether the forecasts will be fulfilled or not, it is essential to prepare measures to ensure the supply of drinking water in dry periods. This paper deals with the preparation of water balances for the areas of the Odra and Morava River basins and the prediction of relationships between water supply and water demand in the given area.

scholarly journals Simulation of Water Resources Carrying Capacity in Xiong’an New Area Based on System Dynamics Model

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 1085 ◽  
Author(s):  
Boyang Sun ◽  
Xiaohua Yang
Keyword(s):  
Water Resources ◽  
Water Supply ◽  
System Dynamics ◽  
Carrying Capacity ◽  
Environmental Governance ◽  
Supply And Demand ◽  
Groundwater Overdraft ◽  
Water Resources Carrying Capacity ◽  
Water Supply And Demand ◽  
Regional Water

In order to comprehensively evaluate the water resources carrying capacity in Xiong’an New Area, a system dynamics (SD) model was established to evaluate the regional water resources carrying capacity, for which several scenarios were designed: the original development scenario, the accelerated industrialization scenario, the environmental governance scenario, and the optimization development scenario. The results show that, compared with the original development scenario, the water resources carrying capacity in Xiong’an New Area can be improved in other scenarios, but a water supply and demand gap will be generated due to the lack of groundwater overdraft and a water transfer project. In 2026, under the accelerated industrialization scenario, the population carrying capacity will be 2.652 million, and the water supply and demand gap will be 1.13 × 108 m3; under the environmental governance scenario, the population carrying capacity will be 2.36 million, and the water supply and demand gap will be 0.44 × 108 m3; under the optimal development scenario, the population carrying capacity will be 2.654 million, and since the supply of water resources will be greater than the demand, there will not be a gap between supply and demand, making it the most feasible scenario to effectively alleviate the tension between industry restructuring, environmental management, and water resources development and utilization. The findings of this study can provide reference and decision support for optimizing regional water resources allocation and enhancing water resources carrying capacity in Xiong’an New Area.

Analysis on Water Resources Supply and Demand Balance of Rural Land Remediation Project in Baishan City, Jilin Province

2013 ◽  
Vol 295-298 ◽  
pp. 2132-2137
Author(s):  
Xiao Ling Xu ◽  
Xu Feng Liang ◽  
Xiu Juan Liang ◽  
Chang Lai Xiao
Keyword(s):  
Water Resources ◽  
Water Supply ◽  
Water Availability ◽  
Water Demand ◽  
Influence Factor ◽  
Supply And Demand ◽  
Rural Land ◽  
Project Area ◽  
Groundwater Availability ◽  
Relevant Calculation

Water resources are an important influence factor of land remediation. As support of food production, analysis of water resources supply and demand balance is an important part and technical support of the construction. According to some relevant calculation formulas on water resources assessment, after forecast of water demand and the calculation of water supply, in the project area of the demonstration construction of whole rural land remediation in Baishan City, the average water availability for many years is 8990.1 thousand m3 each year, in which surface water availability is 7210.6 thousand m3, groundwater availability is 1579.4 thousand m3. Water demand is 5552.4 thousand m3 in 2015, in which water demand for life 4165.2 thousand m3; water demand for agricultural irrigation is 1387.2 thousand m3. Water supply is more than water demand; the results show that there is a slight surplus of water resources in the region. The basic supply-demand balance can be achieved in conditions of the design of water supply project in the project area.

scholarly journals Scenario Analysis of Water Supply and Demand using WEAP Model: A Case of Yala Catchment, Kenya

2017 ◽  
Author(s):  
Jared Ouma okungu
Keyword(s):  
Water Supply ◽  
Water Demand ◽  
Environmental Changes ◽  
Supply And Demand ◽  
High Growth ◽  
Reference Scenario ◽  
Activity Levels ◽  
Time Step ◽  
Weap Model ◽  
Water Supply And Demand

The counties traversed by Yala River Catchment in Kenya have been constrained by acute shortages of water resources because of the declining stream flows, which is occasioned by environmental changes, increasing population and changing land uses. This study applied Water Evaluation and Planning (WEAP) model to evaluate past trends and simulate current demand scenarios for the purposes of planning by authorities in regard to future use. The study used historical data (1970-2015) to assess water supply and demand in the catchment for the period 2016 to 2045 by simulation. Calibration and validation were each performed on 10-year streamflow datasets (1991-2000 and 2001-2010 respectively), drawn from 4 gauging stations. Simulations were then conducted for the scenarios namely: Reference (at 2.8% growth rate), High Growth (3.2%), High Growth (3.5%), and Moderated Growth (2.2%). The categories of water demand evaluated in WEAP included: Domestic-Institutional-Municipal, Agriculture, and Industry uses. In a 5-year time-step, WEAP demonstrated resultant increase in water demand for year 2020 by 7.46% from 2016 at Reference Scenario. WEAP further simulated a gradual increase in water demand during subsequent years. This trend would continue for the rest of the scenarios but with variations occasioned by adjustment of variables in WEAP such as population growth rates, monthly variations, annual activity levels, water use rates, water losses and reuse rates, industrial production units, agricultural acreages, and varied demand sites. In conclusion, there were demonstrated substantial increases in water demands within individual scenarios between 2016 to 2045, but these increases were significantly different scenario-by-scenario. The study recommends that supply and demand measures be employed with the aim of regulating activity levels, losses and consumptions so as to meet demands in case any of the studied scenarios would be applicable.

scholarly journals Simulation of Water Supply and Demand in the Aral Sea Region

1992 ◽  
Vol 17 (2) ◽  
pp. 55-67 ◽  
Author(s):  
P. Raskin ◽  
E. Hansen ◽  
Z. Zhu ◽  
D. Stavisky
Keyword(s):  
Water Supply ◽  
Supply And Demand ◽  
Aral Sea ◽  
Water Supply And Demand

scholarly journals Impact of Rapid Tourism Growth on Water Scarcity in Bali, Indonesia

2021 ◽  
Vol 2 (1) ◽  
pp. 1-16
Author(s):  
Eva Mia Siska Yamamoto ◽  
Takahiro Sayama ◽  
Kaoru Takara
Keyword(s):  
Water Supply ◽  
Water Scarcity ◽  
Water Demand ◽  
Supply And Demand ◽  
Scientific Data ◽  
Clean Water ◽  
Domestic Water ◽  
Domestic Water Demand ◽  
Tourism Sector ◽  
The Impact

Despite Bali’s dependency on tourism, concerns over the impact of tourism on water scarcity are increasing. The objective of this study is to analyze the clean water demand related to tourism growth and compare them with the available clean water supply. This study suggested that tourism water demand has increased by 20.8 million m3 (295%) from 1988 to 2013. Sixty-eight percent of the increase was concentrated in Badung Regency, where the tourism water demand ratio has increased from 31% to 46%. The study also suggested that rapid population growth has caused an increase in domestic water demand by 48.3 million m3 (48%). This study also shows that the capacity of clean water supply in Bali has increased significantly to meet these demands and the water supply coverage of domestic water demand has increased significantly from 13% in 1988 to 53% in 2013. The water supply coverage of tourism demand varies from year to year with an average of 28% in the study period. The increasing issues over water scarcity despite the improvement in the coverage of domestic water demand suggest further investigations. Yet, despite the large gap between supply and demand in the tourism sector the industry still can have undisrupted clean water throughout the year. This indicates the use of alternative clean water which can be obtained locally such as groundwater. Wise water management through the sharing of scientific data, including in the tourism sector is imperative in solving water scarcity in Bali.  Keywords: clean water demand, water scarcity, Badung Regency

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