Abstract

The end of this study was to scrutiny of changes & Detection of discharge & precipitation circles & annual precipitation of Mond catchment. For this purpose, it was Extracted the annual discharge & precipitation data of Baba arab, dehram, dehrud, dejgan, hakan, karzin strait,Tangab & Hanifaghan srations during 1355-1390, then was scrutinized by the Programming Facilities of MATLAB software. The results showed that a 2-6 short time circle almost Surrounded on discharge & precipitation of Mond catchment. Nevertheless it was seen some longtime circles like a 17 & 25 year in discharge of this river. The results of the analysis process of discharge & precipitation showed that the decrease & increase of river discharge was affected by the decrease & increase of catchment precipitation in most of the stations. Nevertheless it can’t be deducted definitely that discharge circles & changes was Depended on precipitation. Hence the effects of morphologic & geomorphologic factors of this catchment can’t be disregarded.