ECOLOGICAL AND CHEMICAL ASSESSMENT OF WATER QUALITY IN IRRIGATION NETWORKS AND RIVER SYSTEMS IN THE CHU VALLEY
The article gives the research findings of chemical composition and pollutants in water of irrigation schemes in the Chu valley. Principles of specifying indices system for irrigation water quality assessment are presented. Water protection and its efficient use are problems of the national importance. While deteriorating qualitative water composition, a “water-soil-plant” ecological system is becoming less stable, water consumption for agricultural production is increasing, soil fertility is worsening and crop yield is decreasing. Under these conditions, agricultural production specifies some certain requirements to irrigation water quality. In this case, irrigation water quality is an economic factor. On the basis of field and laboratory analysis, ecological assessment of water quality of irrigation schemes in the Chu valley was done based on the specifying indices system.