Natural streams are always considered as an easy way to dispose-off many kinds of waste water effluent. Sewage water is discharged into the river at some places and under low flow conditions in river, the waste water in channel causes swear hazardous problems to the nearby communities. Thus, its very important to determine the quality and quantity interchanging from river to adjoining flow domain. Present study was conducted near River Ravi at Lahore.Overall results are presented in this technical book. This book certainly enhance learning among researcher, scientists, students and farm...