Abstract Clayey soils swell on absorbing water and shrinks drying, any constructions built them are subjected to the differential settlements due loss of support from soil. Stabilization clays with various additives have considerable successes. Lime, cement, CaCl 2 , fly ash (FA), ground granulated blast furnace slag (GGBS), pond other chemical reagents been effective in stabilizing expansive i...

Decision support systems (DSS) are potentially valuable tools for assessing the economic and ecological impacts of alternative decisions on aquaculture production. In this paper, we discuss the philosophy of design, functional modules and application areas of POND, a decision tool that has been developed to allow analysis of pond aquaculture facilities by the use of a combination of simulation ...

In order to define an appropriate mathematical model for the flow and mixing characteristics of a high-rate algae pond, impulse-response tests were carried out on an experimental pond located at Ein Karem, near Jerusalem, at Reynolds number = 10 5, and on two scale models of the same pond, at 2 000 < Re < 20 000. Each pond consisted of a continuous rectangular channel with seven 180° bends, and...

Monthly inflow and outflow data were collected from three wet detention ponds in Wilmington, North Carolina, for a 29-mo period. Two ponds drained urban areas consisting primarily of residential, mixed services, and retail usage, while the third mainly drained residential and golf course areas. One of the urban ponds achieved significant reductions in total nitrogen, nitrate, ammonium, total ph...

Odour emission rates were measured for seven different anaerobic ponds treating piggery wastes at six to nine discrete locations across the surface of each pond on each sampling occasion over a thirteen month period. Significant variability in emission rates were observed for each pond. Measurement of a number of water quality variables in pond liquor samples collected at the same time and from...

Amphibians represent a “canary in the coal mine,” as such the diversity and abundance of amphibians is a good assessment of ecosystem health. Pitzer College’s Firestone Center for Restoration Ecology (FCRE) in Barú, Costa Rica, contains mostly recovering rainforest. To monitor its recovery progress, the anuran diversity and density was investigated in 2008, continuing the amphibian population a...

We report a case of Vibrio parahaemolyticus panophthalmitis which resulted from contamination of a wound with water from a pond in inland Georgia. The pond was on the property of an oil refinery which receives crude oil from southern Mississippi. Cultures of the pond water 5 years later did not yield V. parahaemolyticus, but did yield non-O1 V. cholerae and had 0.28% sodium chloride content. V....

Recent university research has shown that a compost system can reduce storm runoff, sediment and nutrient loss, and increase vegetation and soil quality parameters relative to industry standard best management practices. State departments of transportation and construction companies have reported positive results in using compost as a filter media within filter socks. Compost used as a sediment...

Rapid urbanization of Dhaka city has created immense pressure on its urban services including solid waste disposal. Both city corporations (Dhaka North, DNCC and Dhaka South, DSCC) have been facing tremendous problem to maintain sustainable waste management over the last few decades. At present, the DNCC and DSCC dump 68% of the total solid waste to the sanitary landfill site at Matuail. Decomp...