As it is stated above, the major potential hazard to conditions of the Kyrgyz Republic from the climatic change is reduction of the mountain rivers runoff. This statement is correct as agriculture (being a basis of economy of the state) is based on irrigation farming. Mountainous rivers are the main source of irrigation. Because of shortage of surface water resources, the problem arises as to increase of the irrigation systems efficiency and use of ground waters for irrigation.

It is necessary to keep in mind, that surface and ground waters of intermountain valleys of Kyrgyzstan are closely interdependent. The increase of the efficiency of irrigation systems reduces recharge of ground waters and, from the point of view of their balance, is the same as using ground waters for irrigation. The mentioned factors reduce flow of ground waters into downstream areas, where they discharge into surface water sources. That is, replenishment of shortage of surface water resources at the expense of ground waters leads to reduction of surface and ground water resources in the underlying areas. The present paper shows that the mentioned process occurs but with a big delay. The periods of delay may more than 20 years, and this gives time for introduction of agriculture technologies intended for use of smaller quantities of water. The dependences suggested in this paper can be used for similar calculations as far as other intermountain valleys of the Central Asia are concerned.

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