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Identification
Code |
PP00110 |
Project
title |
Experimental
site of rice irrigation system in Karakalpakstan |
Project
location |
The
Republic of Uzbekistan,
Karakalpakstan, Tahtakupir rayon, state farm "Soviet
Uzbekistan" |
Rubric |
70.21.33;70.21.33 |
Rubric (SIC ICWC) |
01.20.01.15; 01.20.05.13 |
Project
duration |
1977-1984 |
Project
manager |
A.Nabiev,
SPA SANIIRI, Uzbekistan, 700187, Tashkent, Karasu-4,11 |
Summary |
Study
is devoted to development of set of measures on water use
improvement and combat soil salinization based
on land drainability increase and leaching through open
and subsurface drainage; to reveal reclamation efficiency
and workability of this type of drainage in multi-layer
soils, soil water-salt regime management. Farm locates
in salt accumulation zone. Relief is smooth. Soils are from
strongly to slightly saline chloride-sulfate and sulfate-chloride
type. Ground water table is 1.3-1.5 m (spring) and 1.8-2.5
m (autumn). Total area is 145ha. Subsurface drainage length
is 1774 m, open drainage-3510 m. Drain depth is 2m, spacing-206-230m.
Irrigation network is earthen; irrigation technique-flooding.
As result of research set of measures providing irrigated
lands and irrigation water productivity as well as farm
profitability increase is developed. Due to two-fold regulation
of ground water table and water-salt regime water was saved
in amount of 5500-7900cu.m/ha or on average 24.24% per hectare. |
Key
words |
Soil
salinization, ground water table, desalinization, water-salt
regime, irrigation water, leaching, rice system, water consumption,
rice, water balance, drainage outflow, salinity |
Bibliography |
1.
Author: A.Nabiev Title: "Efficiency of subsurface drainage
on rice irrigation systems", SANIIRI, 1984 2.Author:
A.Nabiev, Title: "Modern rice systems with subsurface
drainage" Results of experimental investigations are
presented and recommendations given for irrigation norm
and depth on background of open and closed drainage. |
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