Physico-Chemical Properties of Sensitive Marls to Erosion in the Talkherood Basin

Category Sedimentology
Group GSI.IR
Location The 25 Symposium of Geosciences
Author R.Salmasi-H.R.Peirovan
Holding Date 01 July 2007
 

Physico-Chemical Properties of Sensitive Marls to Erosion in the Talkherood Basin

Abstract:

The soil erosion and sediment yield mainly are related to marl formations in the Talkherood watershed. This study was conducted to evaluate physico- chemical properties of Talkherood marl samples in rill, gully, mass and badland erosion types. For this purpose, 4 distinctive lithology of marl deposits were distinguished. One lithology unit was selected as the most sensitive unit to erosion. Samples were taken from this unit. Twenty four samples were selected, in total. Some of main physico-chemical properties of these marls were measured in laboratory. These properties were:  pH, EC, CEC, Lime, gypsum and OC contents, SAR, Na, K, Cl and Ca + Mg and clay, silt and sand percentages. This research showed that selected marl formations has weak alkaline to alkaline pH, low organic matter, higher silt than clay and sand contents and are in saline to saline-sodic with very low to low permeability class. From all of measured properties, only 3 ones including Na content, SAR, and EC are least in badland than other 3 erosion types. There are not significant differences of other properties between 4 erosion types.

 Key words: Talkherood watershed; physico-chemical properties; marl; rill, gully, mass, and badland erosions

tags: QAZVIN