عنوان مقاله English
نویسندگان English
Haram- Abad river basin (area = 2965 Km2) is an elongated basin located in south ofHamedan Province and occurs in the Sanandaj- Sirjan structural zone. 1392 km2 of this region is located in the westernMalayer plain. Five lithofaceis were recognized in the river sediments: Gms, Gm, Sh, Sl and Fm and Fr. The river sediments are very poorly sorted, positively skewed and platykurtic.Four discontinuities were recognized in in the downstream decrease in the gravel percent. They occur as a result of the entrance of side-channel sediment sources (i.e. alluvial fan, tributaries and colluviums) to the main-river channel. Increase in the gravel percent is less significant (3-8%) in those tributaries with lower slope and slate and schist lithology than the tributaries with higher slope and granite and limestone lithology (25-32%). This shows the provenance lithology is also important in the downstream fining trend of the studied river.
کلیدواژهها English
