Hasil Pencarian  ::  Simpan CSV :: Kembali

"Penelitian mengenai kualitas air di Saluran Tarum Barat dilakukan di tiga stasiun yang merepresentasikan bagian awal, tengah, dan akhir pada bulan Februari hingga Mei 2017. Penelitian ini bertujuan untuk mengetahui kualitas dari Saluran Tarum Barat dengan menggunakan makroinvertebrata bentik sebagai bioindikator melalui metode Biological Monitoring Working Party-Average Score Per Taxon BMWP-ASPT. Tidak hanya sampel makorinvertebrata, parameter lingkungan juga turut diukur. Hasil penelitian diperoleh enam famili makroinvertebrata yaitu Naucoridae, Viviparidae, Parathelphusidae, Pisauridae, Palaemonidae, dan Thiaridae. Famili Parathelphusidae dan Pisauridae tidak terdapat dalam daftar skoring BMWP. Saluran Tarum Barat memiliki rentang nilai ASPT 4,25-4,5 yang termasuk dalam kategori tercemar sedang. ......An assessment of water quality in Saluran Tarum Barat has been conducted at three stations representing the beginning, middle, and end of the canal from February until May 2017. This research aimed to determine the quality of Saluran Tarum Barat using benthic macroinvertebrates as bioindicator through Biological Monitoring Working Party Average Score Per Taxon BMWP ASPT method. Not only samples of organisms were taken, but environmental parameter also measure. The results obtained were six families of macroinvertebrates namely Naucoridae, Viviparidae, Parathelphusidae, Pisauridae, Palaemonidae, and Thiaridae. However, Parathelphusidae and Pisauridae families are not covered in BMWP scoring list. Saluran Tarum Barat has ASPT range from 4,25 ndash 4,5 which categorized as moderate pollution."

"This research was carried out to investigate the efficiencies of leachate treatment by usingsubsurface flow constructed wetland (CW) with low permeable reactive media and guinea grass(Panicum maximum TD 58). Pilot scale CW was examined at hydraulic loading rate (HLR) of0.028 m/d and hydraulic retention time (HRT) of 10 d. Two different types of media in CW wereused i.e. system 1: clay and sand mixture at ratio of 40:60 (%w/W) and system 2: clay, iron sludgeand sand mixture at ratio of 30: 10:60 (%w/w). The results showed that the performance of system 2was better in terms of pollutant removal efficiencies. Average BOD, COD and TKN removals were76.1, 68.5 and 73.5% respectively. Methane, carbon dioxide and nitrous oxide emissions during thetreatment of CW were 23.2-52.1, 69.1-601.8 and 0.04-0.99 mymzd respectively. The use of CWwith reactive media in system 2 and vegetation resulted in lower GHG emissions. The results showthat CW with low permeable reactive media could be effectively used to remediate leachate fromthe landfill site."

"In this study, a three-dimensional (3D) hydrodynamic model was developed to investigate the Watercirculation characteristics of a shallow tropical lake environment (Laguna Lake, Philippines) undervarying wind stress, watershed river discharge, and sea interaction (Manila Bay, Philippines) toelucidate hydrodynamic implications to eutrophic vulnerability. The analyses were based on fieldobservations and numerical simulations covering longterm periods (dry and wet season) andintensive field measurements. The results demonstrated different circulation pattems and verticalcurrent regimes in time and space that accentuated a thermally stratified lake environment in spiteof a shallow water depth (2.5 meter average). In the wet season, current movement is generallytoward Pasig River, the lake’s only outlet, with embayment water mass moving in the clockwisedirection. The dry season lake flow pattern was characterized by counter-clockwise gyrecirculations, Pasig River backflow, and salinity intrusion. Wind forces showed strong influence onlake hydrodynamics due to the complex surrounding topography, steep land-ake thermaldifference, regular passage of tropical storms and typhoons, and shifts in the monsoon winddirection. The resulting mixed layer hydrodynamics revealed important implications to theplanktonic movement, nutrient recycling, and primary production of the lake. Long termcontinuous observations and numerical analyses also demonstrated the intrusion of seawater toLaguna Lake that potentially adds to its eutrophic vulnerability with the associated entry of nutrientand microorganism-rich polluted waters from Metro Manila."

"The book is an attempt to initiate a comprehensive environmental security assessment in the basin of the Azov Sea, shared by Russia and Ukraine. At the same time there is an alarming degradation rate of basin freshwater ecosystems that has occurred due to overutilization of certain prioritized services (e.g. transportation). In addition to the review of the current status of Azov ecosystem services, the authors analyze likely future availability and challenges. The relevant experience derived from basin management of the Black Sea and other similar basins is also discussed."

"This book about the Mekong Delta presents a unique collection of state-of-the-art contributions by international experts from different scientific disciplines about the characteristics and pressing water-related challenges of the Mekong Delta in Vietnam."

"Preceding monitoring reports indicated that di (2-ethylhexyl) phthalate (DEHP), a commonplasticizer, was found in the samples of suspended sediment and water collected from the lowerpart of Chao Phraya River. In this continuing study, the suspended sediment and water samplesfrom the Chao Phraya Delta were collected twice a year in January and July during January 201 1 -July 2013. The analyses were performed for both DEHP and Diethyl Phthalate (DEP). Overallresults showed that concentrations of both DEHP and DEP in the water samples were relativelyhigher than those in the suspended sediment samples. The concentrations of DEHP and DEP fromall sampling periods in the water samples ranged from 1.58 - 27.55 pg/L and from 0.64 - 2.59ug/L, respectively, whereas the concentrations of DEHP and DEP from all sampling periods in thesuspended sediment samples ranged from 0.01 - 26.82 mg/g and from 0.01 - 1.93 mg/g,respectively. The concentrations of both DEHP and DEP in both suspended sediment and watersamples were relatively higher in the samples collected during lower discharge period of the ChaoPhraya River in July. The results indicated that sediment transport system could play an importantrole in the dispersion of both DEHP and DEP. The ecological risk assessment indicated that for thecurrent level of contaminations the risk did not exceed the acceptable level."

"Where the dragon meets the Angry River is an incisive look at the possible fates of China and the planet. Will the Nujiang River continue to flow? Will Tibetan girls from subsistence farming families learn to read and write? Can China and the United States come together to lead action on climate change? Far-reaching in its history and scope, this unique book shows us the real-world consequences of conservation and development decisions now being made in Beijing and beyond."