The book consists of 6 parts. It is considered for those specialists, doctorants and students work on the spheres of hydrometerology and level problem of the Caspian sea.

The etymology and formation, modern physical parameters and geographical characteristies and geographical characteristies of the Caspian sea, a new information on its protected areas are briefly elucidated in the first part of the book. The carbohydrogen resources and biological resources are examined in the natural resources part of this chapter.

A vast place is given to the hydrology of the sea, the fourth ceapter is devated to this subject. News maps elucidating sea currents, temperature, saetness, transparency and season changes of hydrologic parameters are given in this chapter.

The level change of the Caspian sea and its social-economic results, longterm forecasting of level change are precisely examined in the fifth chapter after all, the last-sixth chapter is devoted to the ecogeography of the sea, defining of pollution sources, estimation of general ecological conditions.