Knowledge Base

Identification code


Project title

Investigation of regularity of open horizontal drainage system workability decrease and its influence on irrigated lands reclamation condition (old zone of Huangry Steppe).

Project location

The Republic of Uzbekistan



Rubric (SIC ICWC)

Project duration


Project manager

N. Gaipnazarov., SPA SANIIRI

The Republic of Uzbekistan, 700187, Tashkent, Karasu-4/11


Investigations related to study of influence of different natural, organizational and technical measures on open collector-drainage system workability decrease; establishment of regularity of collector-drainage system failure and influence of its workability decrease on irrigated land reclamation condition indexes.    Soils are sierozem-meadow, slightly and strongly saline.Ground water depth from 1,5-2 up to 3-4, mineralization - weakly and strongly saline, sulfate-chloride and chloride-sulfate type. Experimental plot area -144,02 th.ha  Water supply by Dustlik canal.Length of infarm system in concrete layer and flume is 14,7%, specific length -24,1 m/ha. Efficiency -0,7-0,73.Collector-drainage system workability assessment is given on a base of investigation results.

Taking into account regularity of collector drainage system workability and forecasted water-salt calculations the recommendations on terms and volumes of collector-drainage system treatment in Gulistan rayon are developed which allow provide the optimal soil water salt regime and crop harvest increase.

Key words

collector-drainage system; exploitation; reliability


Author - N. GaipnazarovTitle - “ Investigation of regularity of open collector-drainage system workability failure in old irrigated zone of Syrdarya oblast”, SANIIRI, 1987

Assessment of drainage system workability is given on a base of field and laboratory investigations.