نتایج جستجو برای: sand and gravel plant
تعداد نتایج: 16885416 فیلتر نتایج به سال:
This study investigated the efficiency of two types of media, namely, gravels and sand for their nutrient removal capabilities from wastewater. Different levels of sand depths were also experimented for their removal efficiencies. And for this purpose three laboratory scale vertical upflow constructed wetlands (S1, S2, S3) were established at PHE Laboratory, MNIT, Jaipur. S1was filled with two ...
the objective of this research was to study the relationships between edaphic and topographic factors with distribution of plant species. for this purpose, current study was conducted in eshtehard rangelands of tehran province. the sampling method was randomized–systematic and in each sampling unit, three parallel transects with 750 m length containing 45 quadrates (according to vegetation vari...
This study investigated the seasonality of acoustic backscatter intensities, exploring three habitats in southwestern Baltic Sea: 1) a mussel-covered reef, 2) coarse sand and gravel, 3) seagrass meadows. Backscatter information different, partly calibrated frequencies (200, 400, 550, 700 kHz) was collected seasons (May, August, October). The data were supported by point samples video profiles f...
Benthic habitat maps, including maps of seabed sediments, have become critical spatial-decision support tools for marine ecological management and conservation. Despite the increasing recognition that environmental variables should be considered at multiple spatial scales, variables used in habitat mapping are often implemented at a single scale. The objective of this study was to evaluate the ...
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