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Identification
Code |
PP00186 |
Project
title |
Study
vertical drainage systems performance efficiency in
conditions of Hunger steppe.(VDS EPP) |
Project
location |
The
Republic of Uzbekistan, Syrdarya oblast, "50 years
of Uzbekistan" state farm |
Rubric |
70.03.21;
70.21.39; 70.23.39 |
Rubric (SIC
ICWC) |
01.20.01.15; 01.45; 01.45.01.10 |
Project
duration |
1965-1986 |
Project
manager |
Reshetkina
N.M., WNIIGiM Russia, Moscow, 127550, B. Academicheskaya
str., 44 |
Summary |
Studies
are dedicated to soil salinity control on rice irrigation
systems by intensifying area drainability and salt
removal from soils by ground water pumping and providing
soil water-salt regime management Climate is continental.
Soils - serozem-meadow, middle and heavy loam, different
salinity degrees with salt spots. State farmlands are
located in zone of increased ground water inflow. EPP
area is 3 th. ha. On-farm irrigation network - in earthen
channel, efficiency 0.65-0.75. Drainage network depth
is 1.5-3.5 m, specific length is 25-45 m/ha. 28 vertical
drainage wells with depth 65-80 m were constructed.
On farm area balance plots were established with area
100-250 ha equipped by measurement devices. Studies
established that in conditions of Hunger steppe zone
of active water exchange under vertical drainage systems
influence is expanded to one fifth of wells depth (to
100 m), and salt exchange - on top melkozem thickness
(25-30 m). Reclamation effectiveness manifested for
3-4 years instead of planned 7-9 years. Set of
reclamation measures was developed
on ecological-reclamation processes management
to save irrigation water and increase irrigated lands
productivity. |
Key
words |
vertical
drainage; soils; water-salt balance; water-salt regime;
cotton. |
Bibliography |
1
. Authors - Reshetkina N.M., Yakubov Kh.Y. Title - "Vertical
drainage" M., Kolos, 1978 In monograph principles
of irrigated areas classification according to reclamation
complexity, option of perfect drainage types, main requirements
to initial data reception for designing desalinizating
measures and water-salt processes regularities on background
of vertical drainage are given. System analysis of field
study results of soil desalinization process and water
use improvement under leaching and leaching irrigation
regime achieved in experimental-pilot projects and large
irrigated massifs were carried out. Basic • principles
of forming vertical drainage systems pumping regime
including ground water use for irrigation allowing creation
of optimal reclamation regimes on irrigated lands. |
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