Summary |
Investigations
related to adjustment of desalinization methods of heavy
saline lands with complex hydrogeological and ground conditions
by means of autumn-winter leaching and leaching regime conduction
and strengthening soil drainability on background of vertical
drainage.Climate is
sharply continental. Relief is hilly. Ground water
level-1,8-2,2m (vegetation period), 2,5-3,5m (non vegetation
period), salinity 5-8 g/l from chloride-sulfate to sulfate-chloride
type. Soils are sierozem-meadow.
Soil structure corresponds to middle loam with gypsum layer,
heavy saline, sulfate and chloride sulfate type. Area under
investigation is 3000ha, from which 1538 ha under irrigation,
land efficiency -0,87; experimental plot area is 17 ha.
On experimental
plot 28 wells of vertical drainage are constructed with
depth 65-80m.Water supply
from distributor Shuruzyak, from wells of vertical drainage
system, from collector Shuruzyak. During investigation
observation all over elements of water salt balance of aeration
zone, ground water and irrigated lands is conducted.
Recommendations
on water supply and drainability ration are given under
which optimal rates of soil desalinization and maintenance
of root zone humidity in vegetation period are provided.
Leaching technology and leaching regime are adjusted. |
Bibliography |
Author
- Kh. I. YakubovTitle -"Saline
lands reclamation on background of vertical drainage",
Tashkent, "Mehnat", 1990.The principles
of irrigated territory typification on complexity of reclamation
and selection of perfect drainage are given. The main requirements
to obtaining the input data for desalinization measure designing
and water salt processes regularity formation on background
of vertical drainage are developed. Description
and analysis of results of soil desalinization process and
water salt regime management under leaching and leaching
regime are given.
The principles
of vertical drainage operation regime allowing create optimal
reclamative regimes on irrigated lands are given. |
