Knowledge Base
 

Identification code

PP00199

Project title

Investigations of soil water salt regime and ecology-reclamation processes efficiency management on a background of existing irrigation-drainage system of south zone of the Republic of Karakalpakstan

Project location

The Republic of Karakalpakstan, Kegelisky and Chimbaisky rayones.

Rubric

70.03.21

Rubric (SIC ICWC)

01.20.01.15

Project duration

1970-1990

Project manager

E. Kurbanbayev., Karakalpakstan branch of SANIIRI The Republic of Karakalpakstan, 742000, Nukus, Dosnazarov 12

Summary

Investigations related to irrigated lands ecology-reclamation condition improvement by means of water resources rational use and collector-drainage system workability improvement as well as optimal reclamation regime choice providing high crop yield under minimum water resources expenditures. Climate is sharply continental. Soils are saline. Ground water depth- 1,9-2,3 m, high salinity (4-25 g/1). Experimental plot area is more than 500 th. ha. Irrigation system in earth canal, efficiency-0,56, in-farm-0,65, on-farm and main 0,85-0,92. Collector-drainage system is open, in a state of neglect, specific length-30-32 m/ha. On-farm collectors by depth -2,5-3,5m (under designed 5m), in-farm main collectors and drains -1,8-2,0 m (under designed 3-3,5 m). Land efficiency -0,45-0,55 (for cotton zone), 0,75 - for rice zone. Complex  of ecological, reclamation and water saving measures are developed for optimal water salt regime creation in south zone of the Republic of Karakalpakstan.

Key words

soils; water salt regime; water salt balance; soil salinity; drainage flow; rice; cotton

Bibliography

Authors - Kh. I. Yakubov., E. Kurbanbayev, S.K. Petrakova. Title  - "Soil water salt regime in south zone of the Republic of Karakalpakstan and regulation methods" Nukus, "Karakalpakstan", 1985. Assessment of present reclamation condition of irrigated lands, irrigation-drainage system workability change and connected with them ecology-reclamation processes is given. The main reasons of soil productivity and irrigation water decrease are clarified on the basis of analysis of water salt regime and water salt balances formation. Basic measures on irrigated lands reclamation condition improvement are suggested.