While most of the world's large rivers are heavily engineered, channel response to engineering measures on decadal century and several 100 km scales is scarcely documented. We investigate Lower Rhine River (Germany-Netherlands) measures, in terms slope bed surface grain size. Field data show domain-wide incision, primarily associated with extensive narrowing. Remarkably, has increased upstream ...

An increase in seawater that experiences high tides can cause tidal flooding. Tidal flooding the Semarang area requires quick and precise handling, so an emergency dam is needed to deal with overflow or This study discusses Knock-Down weir as a practical weir. also aims test shear stability of model against wall roughness based on variations soil types, namely: masonry, gravel, sand, clay. The ...

A mixed bacterial culture consisted of Staphylococcus sp., Bacillus circulans-I and -II has been enriched from contaminated soil collected from the vicinity of an endosulfan processing industry. The degradation of endosulfan by mixed bacterial culture was studied in aerobic and facultative anaerobic conditions via batch experiments with an initial endosulfan concentration of 50mg/L. After 3 wee...

Increasingly, products containing humic substances are appearing in the turf industry market claiming to reduce water and fertilizer use by increasing soil moisture and nutrient availability. Humic acid is the most common humic substance that has been studied, but results have been highly variable (Cooper et al.; 1998).The response of humic acid is difficult to interpret due to confounding effe...

The performances of the standard Petersen, Ekman, and Ponar grabs were compared using 2 sets of samples collected from gravel, sand, silt, and mud substrates. The data obtained during this study show that estimates of macroinvertebrate populations may vary considerably depending on the grab utilized, the nature of the substrate, and the number of replicate samples collected. The Ekman sampler w...