scholarly journals Assessment of impacts of utilization on water resources in the basin of trans-boundary Red river system

2020 ◽  
Vol 19 (4) ◽  
pp. 497-505
Author(s):  
Do Huy Cuong ◽  
Nguyen Lap Dan ◽  
Bui Thi Bao Anh ◽  
Nguyen Thi Nhan ◽  
Nguyen Xuan Tung ◽  
...  

The Red river system is the large trans-boundary river system, there has been no united system of hydrology stations as well as integrated plan for the water use and management in the whole basin. The trend of water resources change in the Red river system basin has been assessed on the basic of statistic analyses of data observed during the studies, especially in the time when the exploitation of water resources has been intensified for the multisectoral development. This paper shows some of the results from considerations of the water use in the highlands that is influential in water resources in the Red river system basin and the planned reservoirs which are built in the basin of Red river system. The results include the assessment of the state and trend of water resources in the Red river system basin, the trend of water level lowering in the lowlands and its impacts.

2017 ◽  
Vol 1 (92) ◽  
pp. 26-29
Author(s):  
K.I. Ryzhova ◽  
V.M. Mandzyk

The article deals with issues of management and financial support land use water resources Ukraine in terms of decentralization. It was established that one of the obstacles to decentralization in Ukraine is the lack of necessary funding infrastructure upgrades lands of water fund. The necessity of reforming the institutional system of water use on the lands of water fund, through the implementation of new institutional forms of economic development, water resources, focused on the water and agricultural needs of communities. In particular, they provide for the establishment of partnerships between the state and private enterprise entities and ensure diversification of investment water management and protection projects.


2012 ◽  
Vol 15 (4) ◽  
pp. 87-101
Author(s):  
Hung Thanh Nguyen

Water scarcity is an ongoing reality in many river basins due to the need for increasingly water use associated with water pollution and climate change. Faced with this situation, it is necessary to know the true value of scarce water resources to contribute to effective water allocation. In this paper, a model to optimize the allocation of water resources with the constraints in terms of hydrology has developed based on the principle of balance in marginal net benefits of water use across sectors, and test applied to solve the optimal water sources allocation in the downstream area of the Dong Nai river system basin with many different water scarcity scenarios. The results show that the model allows simulating relatively good optimized water allocation for the competitive water use demands in the cases of shortage of water, and also allows determining the balanced margin net values/ benefits of raw water corresponding to the different levels of water shortage.


Author(s):  
Elmarie Van der Schyff

South Africa's water law dispensation has changed dramatically with the promulgation of the National Water Act 36 of 1998.  The previous distinction between public and private water has been abolished and the Minister of Water Affairs and Forestry has been appointed to act as trustee of the nation's water resources.  Through the working of section 4(4), exclusive rights of water use, which were in force before 1998, were replaced by water allowances, granted in the discretion of the relevant authority.The key issue, which is investigated in this article, is whether the state, through the provisions of the National Water Act, expropriated vested rights in property or whether such infringement merely constituted a deprivation.The new concept of property in terms of section 25 of the Constitution of the Republic of South Africa and the distinction between deprivation and expropriation are examined.  It is indicated that the concept of property in South African law has been extended to include not only ownership but also rights in property.  Existing water use rights, which were available to certain individuals in terms of the 1956 Water Act, can be classified as property.Section 25(1) authorises the infringement of private property in certain defined instances.  Despite the many academic works which define the difference between deprivation and expropriation as described in section 25(2), the Constitutional Court clarified this matter in First National Bank of SA Ltd t/a Wesbank v Commissioner for the South African Revenue Services 2002 7 BCLR 702 (CC).  Expropriation is described as a sub-category of deprivation.  Only when it has been established that the requirements of section 25(1) have been complied with, is the question of whether deprivation constitutes expropriation, asked.The requirements for deprivation, expropriation and inverse condemnation are discussed with reference to applicable case law.After the aim of the National Water Act was weighed up against the disadvantages which individuals suffer through the infringement of their vested rights, the conclusion was reached that the nation's need for sustainable water resources carries more weight than the individual's exclusive right of use of water.  A constitutionally valid deprivation has thus occurred.  Due to the fact that the state did not appropriate any rights in this process, the conclusion was reached that this provision does not amount to expropriation.  It does however appear that the provisions of the National Water Act can give rise to inverse condemnation or constructive expropriation in specific circumstances.In addition, three other strategies of strengthening international environmental governance should be pursued: First, the various international environmental treatymaking and treaty-implementation processes should be better harmonised or, at least, co-ordinated; in this context, UNEP is called upon to continue and intensify its efforts to enhance the synergies and linkages between multilateral environmental agreements (MEAs) with comparable areas of focus, by prompting the respective MEA secretariats to enter into appropriate co-ordination arrangements and giving them full logistic support in this respect. Second, as many non-governmental organisations (NGOs) have considerable knowledge and expertise in environmental and developmental matters, States should consider intensifying the partnership with them. States should, however, be empowered to make a selective choice among the mass of NGOs operating at international level. They should accept as partners only those NGOs which meet certain qualitative requirements. Third, as local governments are key components of national sustainable development strategies if such plans are to succeed, the existing local Agenda 21 processes should be expanded and intensified. In particular, supporting the direct engagement of local and sub-national institutions from around the world in international activities and partnerships is an important component of good international environmental governance.


Water ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 2791
Author(s):  
Chi Xu ◽  
Zhenyang Peng ◽  
Hongya Zhang ◽  
Zijie He

China is a country where the levels of water resources per capita are extremely low. With the rapid development of urbanization, water resource shortages have become a bottleneck existing in more and more cities. This study considers the comprehensive management of urban flood control, water supply, water and the ecological environment, catches the main contradiction between “water deficient” and “water rich” in cities, puts forward a comprehensive utilization pattern for urban water resources by emphasizing the utilization of rain–flood resources. After a simulation study, a better regulation pattern is brought out and achieve multiple benefits based on the river system of Gucheng Lake, which is located in Nanjing, Gaochun district, by optimizing conventional regulation. The results show that two parameters, the low water level (LWL) below which Gucheng Lake stops supplying ecological water, and the high water level (HWL) where Gucheng Lake stops importing water from rivers, are the key parameters to decide the regulation benefits, and the LWL of 9 m and HWL of 12 m is the best combination in river network regulation, the annual potential utilizable of rain–flood resources of Gucheng Lake river system can reach 57 million m3 per year, through the comprehensive utilization of the rain–flood resources, the negative effect of flood is effectively reduced and the disaster is controlled on one hand; and the water demand of urban and rural water supply, 100,000 m3/day, is effectively guaranteed as well as the regional ecological environment is improved on the other hand.


2020 ◽  
Vol 20 (3) ◽  
pp. 325-332
Author(s):  
Le Nhu Da ◽  
Le Thi Phuong Quynh ◽  
Phung Thi Xuan Binh ◽  
Duong Thi Thuy ◽  
Trinh Hoai Thu ◽  
...  

Recently, the Asian rivers have faced the strong reduction of riverine total suspended solids (TSS) flux due to numerous dam/reservoir impoundment. The Red river system is a typical example of the Southeast Asian rivers that has been strongly impacted by reservoir impoundment in both China and Vietnam, especially in the recent period. It is known that the reduction in total suspended solids may lead to the decrease of some associated elements, including nutrients (N, P, Si) which may affect coastal ecosystems. In this paper, we establish the empirical relationship between total suspended solids and total phosphorus concentrations in water environment of the Red river in its downstream section from Hanoi city to the Ba Lat estuary based on the sampling campaigns conducted in the dry and wet seasons in 2017, 2018 and 2019. The results show a clear relationship with significant coefficient between total suspended solids and total phosphorus in the downstream Red river. It is expressed by a simple equation y = 0.0226x0.3867 where x and y stand for total suspended solids and total phosphorus concentrations (mg/l) respectively with the r2 value of 0.757. This equation enables a reasonable prediction of total phosphorus concentrations of the downstream Red river when the observed data of total suspended solids concentrations are available. Thus, this work opens up the way for further studies on the calculation of the total phosphorus over longer timescales using daily available total suspended solids values.


2020 ◽  
Vol 38 (3) ◽  
Author(s):  
Marium Sara Minhas Bandeali

Water governance and management are important challenges for the River Indus Basin in Pakistan. Water governance refers to social, political and economic factors that influence water management. The water scarcity and water security are a major concern for the state to control its water resources. The study aims to give Sindh water policy by exploring the challenges to Indus Basin in managing water resources and to identify opportunities Indus Basin can look to improve water management. Interviews were conducted from water experts and analysts having 5 years’ experience or more in the water sector of Pakistan through a semi-structured self-developed questionnaire using purposive sampling technique and transcripts were analyzed using thematic content analysis. The findings show that increasing population, climatic change and rising demand of water are major challenges Indus is facing and Indus with time is getting water-scarce therefore need strong institutions, civil society and legislatures to ensure equitable distribution of water and maintain the ecosystem. The study emphasizes that water governance and management are necessary for sustainable use of water. Pakistan, the water stress country needs to address ‘governance’ at a wider scale to solve problems in the Indus Basin for the livelihood of people. The research will benefit the state, water experts, institutions as well as civil society to promote efficient use of water in Indus Basin.


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