| |
Identification
code |
PP00068 |
Project
title |
Surface
water saving at on-farm level and drainage outflow decrease
through the use of groundwater and its level regulation |
Project
site |
Republic of Uzbekistan, Fergana province, Alty-aryk rayon, Atakoulov collective
farm |
Rubric |
70.23.15;
70.21.33 |
Rubric
(SIC ICWC) |
01.45.01;
01.30.03 |
Project
duration |
1963-1965 |
Project
manager |
Abbas
Usmanov, SPA SANIIRI
Karasu 4/11,
Tashkent, 700187, Republic of Uzbekistan |
Summary: |
The
research aimed at the improvement of fresh and slightly
saline groundwater regulation by special partitions in on-farm
drainage system in order to save surface water and to reduce
drainage outflow. According to natural and economic characteristics
this pilot plot is typical for Central Fergana. Relief: slightly corrugated plain. Climate is sharply
continental. Soils are low saline. Site area is
250 ha.Irrigation network
is earthen. Irrigation water salinity is 0,44-0,1 g/l, while
groundwater salinity is 0,8-2,0 g/l.Drainage system
is located on low elevated lands; its specific extent is
36 m/ha. Drain depth is 2.4-3.0 m. Distance between drains
is 400-650 m. The partitions are built every 75-200 m in
the drainage system.
The pilot site was divided into 3 observation sections
with 28 experimental fields. The site was equipped with
devices measuring soil moisture, groundwater level, and
soil salinity.
It was established
that due to groundwater level regulation number of waterings
can be reduced (on 2 waterings), irrigation interval may
be increased (on 10-30 days). Surface water saving is 2.0-2.5
thousands m3/ha. Drainage outflow reduction is
30-40 % of annual outflow. Short-term (within growing season)
raise of brackish groundwater level does not influence soil
salinization. Area of implementation of studied method is
limited to groundwater seepage zone. It can be applied also
to transition zone after preliminary study. |
Key
words |
Water
table, drainage outflow, partitions, soil moisture, irrigation
regime |
Bibliography |
Author(s): A.Usmanov, Y.KorshunovTitle: Soil water and cotton irrigation
Publication details:
The possibility of groundwater use for irrigation through
its level regulation; features of cotton cultivation under
shallow water. |
|
|
|
