Abror GADAEV
Samarkand state architectural and construction university, Construction of engineering
communications Faculty, Water supply, sewerage and water resources protection Department,
Samarkand, Uzbekistan
ORCID ID: 0009-0005-7343-8534
Anvar JURAEV
Samarkand state architectural and construction university, Construction of engineering
communications Faculty, Water supply, sewerage and water resources protection Department,
Samarkand, Uzbekistan
ORCID ID: 0009-0003-5777-4613
ABSTRACT
In Uzbekistan including other Central Asian (CA) countries the most urgent issue is the water resources sustainable management. The global ecological problem as the Aral Sea disaster makes it more urgent not only for one nation but also for the all CA region. As it is known, that the process of society development is almost impossible without negative influence upon the nature and such influence leads to change in natural balance. There are environmentally safe and enough by hydrologically balance of the ground water resources in the region. Increasing the number of the population and industrial enterprises as consumers leads to an increase in their demand for water and, accordingly, the number, capacity and costs of water wells increase. In order to supply water to consumers, in most cases, additional wells are built, the cost of which is much higher than prolongation of the old ones. This article is devoted to the water well rehabilitation by using complex acids as the organophosphoric complexsones. Operation of the water wells in the condition of poor groundwater quality, in high water rigidity is a result of the salt depositions, filter corrosion producs in the pores and on the surface of the water well filters as well as near filter zone. It leads to decreasing in the productivity of wells. At the UZWATER ceter of SamDAQU studied the clogging deposits as the chemically and mineralogically multicomponent comlex composition colmatant. Which is the main reason for reducing a productivity of the water wells. Also developed effective method by using complex reagents as organophosphoric complexones and carbon dioxide which will help to removal of the clogging deposits and a stable work of the water wells.
Keywords: water wells, debit, filters, colmatant, reagents, rehabilitation. Uzbekistan and other Central Asian countries including Kazakhstan, Kyrgyzstan, Turkmenistan, Tajikistan and Afghanistan are struggling to come to terms with an ecological disaster affecting the Aral Sea. The crisis has been brought about by the mismanagement of water resources from the Aral’s main tributaries, the Amudarya and the Sirdarya rivers. The primary source of quality drinking water in Uzbekistan and Central Asia is ground water, which accounts for between 85 an 90 % of the general water budget. Agricultural irrigation systems have caused high pollutions levels in the region’s (unevenly distributed) surface waters. Historically water flow the Aral Sea was 56 km3 per year, which decreased to 47 km3 between 1966 and 1970. Water flow plummeted to 2 km3 between 1981 and 1983, and now stands at less than 1,8 km3 . A key question is how to balance social and economic development with natural resource protection. Central Asian Republics utilize the same watersheds and share many water management issues in common. It is clear that the region’s existing multination and regional water management and environmental protection project are insufficient by themselves to meet the scale of the problem. Further multinational agreements and joint-state/joint-agency programs will undoubtedly be required.