CALCULATION OF SOLUBLE LOADS IN TIGRIS RIVER AT BAGHDAD AND IT'S EFFECTS FACTORS

Abstract

The area of Tigris river Basin is (471606) square kilometers, and the mostof outcrops rocks for this basin are sedimentary type.The rate of rainfall at the Basin ranging from 1000 ml/ year at the northern of the basin to150ml/ year at the southern of the basin.Applied the results which, had been gotten from collected samples for two years 1988-1989and 1989-1990 for calculated total dissolved solids and total ions.It had been found the larger cautaions and anions were calcium and sulphate respectively.Applied ten methods for calculated dissolved solids by three equations (linear, logermatic,polynomial).It was found the linear equations were the best for calculated yearly loads. Dissolved solidsgenerally effected by geological and hydrological factors, and showed the rains effect onloads very clear at winter season, while the snow melting effects was at spring season.