13% . To the north the 12% isohaline runs somewhat south of the boundary 

 between the Northern and Central Caspian. Farther north salinity falls fairly 

 sharply at the delta of the rivers Volga and Ural. A picture of the distribution 

 of the surface salinity is given by Figs. 263a and 263b. 



In the open parts of the Sea salinity increases with depth, as shown in 

 Table 228 which gives the average annual salinities for August 1933. 



Vertical salinity distribution is also given in the foregoing diagrams (Fig. 

 261a, в, c). 



The quantity of river water and precipitation received by the eastern shores 

 is very low, since evaporation is considerable. As a result a greater or lesser 

 rise of salinity is observed in all the inlets of the eastern part of the Caspian 

 Sea. In Kaidak, which no longer exists, salinity reached 59-52% in 1934 

 (with. a chlorine number of 2501). In the inner parts of Krasnovodsk Bay 

 salinity is almost as high, but it reaches its maximum in Kara-Bogaz where 

 at times it goes up to 200% o . S. P. Brujevitch (1950) has pointed out that a 

 decrease of river inflow has caused a considerable rise of salinity in the 

 Northern Caspian. Thus in 1939 the average surface salinity reached 5-42% in 

 chlorine, i.e. a salinity observed in the depths of the Central and Lower 

 Caspian {Table 228). 



Table 227 



