T. AHMAD • Department of Mathematics, Faculty of Science, University of Technology Malaysia, 81310 Skudai, Johor, Malaysia. • Electronics Research Group, School of Engineering, Sheffield Hallam University, City Campus, Pond Street, Sheffield S1 1WB, UK M. A. HOSSAIN • Department of Computing, University of Bradford, Bradford BD7 1DP, UK. • Electronics Research Group, School of Engineering, Shef...

Erosion and sedimentation are normal geologic processes which are usually accelerated by irrigating agricultural lands. Of the sediment in irrigation runoff, 70% was removed in a sedimentation pond. Removal efficiency correlated well with flow rate and sediment concentration. Pond design should provide maximum velocity reduction early in pending, allow adequate storage space for the larger part...

Two identical pilot-scale reactors – one as an oxidation pond (OP) and the other as a freewater-surface-flow constructed wetland (CW) planted with Cyperus papyrus – were fed with a lowstrength domestic wastewater at the organic loading rate of 16 kg BOD/ha-d. The purpose of this study was to investigate how the solar energy dissipated into the biomass productivities during the wastewater treatm...

Abstract Ferrate is recently known as a green agent since it provides simultaneously oxidation, coagulation, and disinfection processes for water treatment without harm to the natural environment. However, its application in aquaculture wastewater still rarely found. In this study, chemical wet oxidation method was utilized synthesize solid ferrate which then applied treatment. The samples were...

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...