In the aim of assessing the potential of tributary widening with respect to river rehabilitation in fluvial systems, attention is focused on the effects of tributary widening on the morphodynamic processes of confluence zones. Systematic tests were performed in a confluence flume where the confluent channels are connected with an angle of 90° and the main channel is 0.50 m wide. Three different...

The object of the investigation is to study reducible $M$-ideals in Banach spaces. It is shown that if the number of $M$-ideals in a Banach space $X$ is $n(<infty)$, then the number of reducible $M$-ideals does not exceed of $frac{(n-2)(n-3)}{2}$. Moreover, given a compact metric space $X$, we obtain a general form of a reducible $M$-ideal in the space $C(X)$ of continuous functions on $X$. The...

ducators who understand that schools are complex interdependent social systems can move their organizations forward. Unfortunately, many education leaders today fail to grasp the interconnectedness of these components, resulting in little or no progress. As such, many planned changes address only symptoms, not the underlying root causes, of the problems. Subsequently, meaningful improvements do...

Much of the existing conceptualization of fluid flow in karst aquifers is based on work in extensively cemented and recrystallized Paleozoic and Mesozoic carbonates. Within these aquifers, flow is often primarily through conduits (White 1969, 1977; Smart and Hobbs 1986; Ford and Williams 1989), although diffuse flow may occur through secondary porosity, such as fractures and joints (Shuster and...

Site-specific data are needed to perform feasibility assessments and remedial design for in situ bioremediation of chlorinated aliphatic hydrocarbon (CAH) contamination in ground water. Site-specific data are needed because treatment effectiveness is determined by the metabolic capabilities of native microorganisms, the combinations and concentrations of contaminants, and a variety of other fac...

A total of 48 experiments were conducted to investigate the impact slit weir dimensions and locations on maximum scour depth area created upstream. The model was a 110 mm opening, it installed at end working section in laboratory flume. flume 10.0 m long, 30 cm wide, deep, almost middle. It includes 2 with mobile bed thickness. In bed, two types nonuniform sand (with geometric standard deviatio...