There is annual monthly information about frequency atmosphere circulation processes. In the current Data Base there are standard measurements of average water daily discharges for stations and gauges presented in the List of Stations and List of Stream Gauges. Hydrological gauges were established in upper and lower parts of rivers and near their confluence. There is a stage discharge for continues records of stream stage. At these times an observer measures water discharge through a cross profile in specially appointed place of river.
Water discharge is measured by electric-mechanical current meter.
There is a bridge or a suspended chair where observer measures water discharge. A transect of discharge measurements is made every 1 m. Topographic survey of cross profile in river bed is carried out one time per month during low-water and every ten days during flood. At some gauges the water samples are collected one time every day for measurements of bed and suspended load quantity, chemical composition and there are special pools for measurement of water evaporation. Except these standard measurements at some gauges the water samples are collected one time per day for measurements of bed and suspended load, and chemical composition. There is general information about the Northern Tien Shan's lakes and water storage, genetic classification of lakes, morphometry of lakes and water storage, annual data of lake levels and water storage, data of water balance, temperature, ice regime, waves and currents, water resources, runoff regulation and silting of water storage.