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Identification
Code |
PP00170 |
Project
title |
Assessment
of existing collector-drainage network effectiveness, development
and introduction of measures on drainage systems efficiency
increase. |
Project
location |
Turkmenistan,
Charjow oblast, Charjow rayon, "Leningrad" collective farm |
Rubric |
70.23.39 |
Rubric (SIC ICWC) |
01.45.01.10 |
Project
duration |
1970-1985 |
Project
manager |
Kalantayev
V.A., TurkmenNIIGiM Turkmenistan, 744012, Ashkhabad, Ostrovsky str., 30 |
Summary |
Studies
are dedicated to issue of water, salt, aerial and nutrient
regimes management on irrigated lands, soil fertility increase,
drainage flow reduction, more effective water resources
use on base of regulated drainage use - vertical drains
vacuum systems. Climate is continental, dry. Relief is smooth.
Soils top layer (1.5-2.5 m)- loam and sandy loam, salinity
is about 1% on solid residue, type is sulfate-chloride.
Ground water table is 1.2-1.5 m (in spring), 1.8-2.5 g/1
(autumn-winter), salinity 5 g/1. EPP area is 1500 ha (net).
Irrigation network - in earthen channel. On plot vacuum
drainage system is constructed operating by gravity and
with forced pumping under disposal of forced wastes. Vertical
drains and collectors are made of polyethylene pipes, open
collectors are water collectors. Constructed before open
horizontal drainage and irrigation leaching regime didn't
five expected results, seasonal salinization progressed.
Multiyear studies of vacuum drainage systems allowed to
make conclusion: regulated drainage operation allows to
create flexible ground water regime for soil water an salt
regime optimization, increase GWT lowering rate, reduce
irrigation water expenses for salt leaching from soil, increase
soil desalinization rates, create negative salt balance
of all aeration zone, and reduce ground water salinity in
10 meter soil thickness, increase irrigated lands fertility
and cotton crop yield capacity. |
Key
words |
Vacuum
drainage; ground waters; irrigation leaching regime; salinity;
waterOsalt balance; drainage flow; cotton |
Bibliography |
1.
Author - Kalantayev V. Title - "Irrigated lands drainage
and its intensification methods" Ashkhabad "Ylym", 1984 In monograph
problems of drainage intensification - the most important
mean of irrigated lands salinity control and soil salinity
prevention - are considered. Efficiency of drainage of different
type - horizontal, vertical, combined - is showed. Description
of new drainage systems design is given, developed by the
author, their calculation principles, data about introduction
of vacuum systems, mobile drainage into production, principles
of irrigated lands area zoning according to conditions of
new design drains are given. |
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