Since 1982, an annual cadastre has been compiled by the Operational-Hydroeconomic Services. The cadastre is a tool for water resources management on irrigated areas and hydrameliorative systems (HMS). Today, this cadastre does not meet current requirements because of several drawbacks. First, the meliorative condition of irrigated
R.K. Ikramov (*), A.M. Samiev, and V. Muhtarova Scientific Institute, Karasu-4, Block 11, Tashkent, Uzbekistan e-mail: [email protected]
areas (MCIA) is assessed by comparing actual average depth to groundwater (LGW) during the vegetation period and degree of soil salinization in autumn with their acceptable value (even though the meliorative well-being may be reached over a range of LGW and different infiltrations). Second, of the factors directly influencing MCIA, only the infiltration for vegetation is considered. The mineralization and quality of water are not taken into account. The degree of drainage is not determined and assessed at all. Third, the necessity of capital repairs and reconstruction of water facilities and drainage system is established only by comparing actual depth of LGW against an acceptable value without taking into account cause effect relation.
We suggest that the cadastre be used for the following problems: (1) guaranteeing a favorable water-salt regime of soil and ground water; (2) reaping a good harvest; (3) maintaining a sufficient water supply during the vegetation period; and (4) providing safety of hydrameliorative systems; that is, minimizing negative ecological implications of meliorative activities and creating the required economic and social conditions on HMS (agricultural products) on meliorated areas. To solve these problems, it is necessary to ascertain assessment criteria of the meliorative activities, structure and assessed value of indices (which can vary spatially and temporally).
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