J. Bio. Env. Sci.5(4), 564-572, October 2014
This preliminary research was to evaluate the water quality assessment through macro invertebrates and selected physio-chemical parameters in Sultanabad Stream (Nallah in Urdu). Samples were collected from six different locations started from upstream to the downstream of the Stream (Nallah). Sampling was done using standard methods such as Macroinvertebrates collection through Kick net having 500um mesh size and selected physio-chemical parameters such as dissolved oxygen (DO), Total Dissolved Solids (TDS), temperature and pH. Most of the physio-chemical parameters were measured using multi parameter probe at the sampling occasion except Electrical Conductivity (EC), Nitrites and Nitrates which were measured using Conductivity meter and nitrate strips in the laboratory respectively. A total of 718 macro invertebrates were recorded comprising of Chironomidae (Diptera) (78%) being most dominant group, Ephemeroptera (17%), Plecoptera (4%) and Trichoptera (1%). Sensitive group of macro invertebrates like Ephemeroptera, Trichoptera and Plecoptera were abundant at upstream and at junction point as compare to other locations of the Stream, indicating good water quality at upstream. One way ANOVA showed significant difference of most of water quality parameters with respect to various locations. Result of overall mean physio-chemical properties of the stream were like alkaline pH (7.4), low temperature ( 8.9 oC), high DO (10 mg/l ), low TDS (284.4 mg/l ), low nitrites ( 0.88 mg/l) and nitrates (8.8 mg/l) and low EC ( 467 µS/cm).
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