HYDROCHEMISTRY OF HIGH-MOUNTAIN PAMIR RIVERS: FORMATION, CHANGES AND INFLUENCE ON THE CHEMICAL COMPOSITION OF IRRIGATION WATER

The purpose of the research is to analyze prospects for agriculture development in Central Asian region and Tajikistan particular, terms identifying main favorable constraining factors further development. Pyanj river one tributaries Transboundary Amu Darya River region, whose waters are a source drinking water supply population 80% used irrigation agricultural land. trend deteriorating quality systems recently has been increasing, monitoring from formation zone downstream rivers problem region. statistical methods Pearson correlation meteorological conditions basins were used. In Laboratory Environment Geology Department Geological Sciences University Colorado at Boulder (USA), as well Moisture Chemistry Institute Arctic Alpine Research (USA) by use an inductively coupled plasma mass spectrometer (ICP-MS) ion chromatography was conducted element analyses waters. physical chemical samples using “TaLab” spectrophotometer following relevant state standards. suitability determined calculation coefficients sodium adsorption (SAR), percentage (Na%), solubility (SSP), exchangeable (ESP). contribution Gunt enrichment with Fe, Co, Ni, Sr, Ca, Mg, Na, K elements established. assessment natural carried out various index methods, such SAR, ESP, SSP %Na.