Ecological Studies on Benthic Invertebrates as Indicators of Organic Pollution in El- Rahawey Region, Giza, at River Nile, Egypt

Abstract

The present work aimed to detect the effect of organic pollution discharges from El-Rahway drain on macroinvertebates in relation to some physical and biological variables during 2004. Four stations were selected to cover as possible the area of investigation. The following is a summary of the obtained results: 1. ABIOTIC VARIABLES 1.1. Temperature: Water temperature values were found increased during hot months recording its average of 29°C in August 2004 while, decrease gradually during cold months recording minimum average of 16.63°C during December. 1.2 Water depth : The depth of water in the area investigated ranged from 5.5 m in section 3 Middle during May to 0.4m recorded at section 4 West during September. The maximum average of water depth 3.5cm was recorded at section IMiddle while the lowest one 0.5cm were recorded at section 4 West.