... persistent through-ßow in thedownstream direction and do not exhibit signiÞcant natural density stratiÞcation, the 1- day, 10 -year low ßow (1Q10) and 7-day, 10 -year low ßow (7Q10) for the CMC and CCC, ... (Ferris, 19 51; Gregg, 19 66; Gieske and De Vries, 19 85; Maas and De Lange, 19 87; Serfes, 19 87; Rowland and Hannoura, 19 88). Using that solution to describe the ßuctuatingvelocity Þeld, Yim and Mohsen ... integralparts of ground water ßow systems, and ground water interacts with surface water innearly all landscapes — from small streams, lakes, and wetlands in headwater areasto major river valleys and seacoasts....