The Experts below are selected from a list of 55476 Experts worldwide ranked by ideXlab platform
Hu Yongding - One of the best experts on this subject based on the ideXlab platform.
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cause of over Water Quality Standard and control measures of state controlled sections in northern Water deficient area of jiangsu
Meteorological and Environmental Research, 2010Co-Authors: Hu Yongding, Han Baoping, Qian Xin, Yuan XingchengAbstract:Taking state-controlled section of Xuzhou Peiyan river as an example,the current Water Quality was monitored,and the cause of over Water Quality Standard was analyzed.The results showed that the pollutants of Peiyan river were mainly from the urban river segment,and the immediate cause of over Standard was tributary pollutants in urban river segment with the runoff into rivers.So we should strengthen the maintenance of drainage control and gate-han,accelerate the construction of urban wasteWater treatment facilities and supporting pipe network,promote rural decentralized sewage treatment,prevent and control livestock and poultry pollution,pesticides and fertilizers pollution,and intercept non-point source pollution by using eco-technology.
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cause analysis of over Water Quality Standard and control measures of state controlled sections in northern Water deficient area of jiangsu province
Journal of Anhui Agricultural Sciences, 2010Co-Authors: Hu YongdingAbstract:Taking state-controlled section of Xuzhou Peiyan river as an example,the current Water Quality was monitored,and the cause of over Water Quality Standard was analyzed.The results showed that the pollutants of Peiyan river were mainly from the urban river segment,and the immediate cause of over Standard was tributary pollutants in urban river segment with the runoff into rivers.So we should strengthen the maintenance of drainage control and gate-han,accelerate the construction of urban wasteWater treatment facilities and supporting pipe network,promote rural decentralized sewage treatment,prevent and control pesticides and fertilizers pollution,intercept non-point source pollution by using eco-technology.
Steven P Canton - One of the best experts on this subject based on the ideXlab platform.
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selenium sediment toxicity thresholds and derivation of Water Quality criteria for freshWater biota of western streams
Environmental Toxicology and Chemistry, 1997Co-Authors: William D Van Derveer, Steven P CantonAbstract:Waterborne and sediment selenium (Se) data, in conjunction with selected physicochemical parameters, were collected from streams of the middle Arkansas River basin, Colorado, USA, to examine the factors affecting sediment Se accumulation in a lotic environment. An empirical model of dissolved-to-sediment Se transfer in western streams, as an interactive function of sediment organic carbon content, was developed and validated. Sediment Se and associated biological effects data were compiled from the literature, to provide an estimate of sediment Se concentration thresholds that have biological effects. Based on this preliminary analysis, sediment Se concentrations of 2.5 {micro}g/g would be a threshold based on predicted effects and concentrations of 4.0 {micro}g/g would be the observed threshold for dish and wildlife toxicity. The dissolved-to-sediment Se transfer model can be used to translate this type of sediment Se toxicity threshold to a site-specific chronic Water-Quality Standard for western streams based on empirically derived sediment total organic carbon values.
Taejin Park - One of the best experts on this subject based on the ideXlab platform.
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development of Water Quality criteria of ammonia for protecting aquatic life in freshWater using species sensitivity distribution method
Science of The Total Environment, 2018Co-Authors: Taejin Park, Changhee Park, Seongdae Moon, Jiwoong Chung, Younjoo An, Donghyuk YeomAbstract:Abstract Ammonia is deemed one of the most important pollutants in the freshWater environment because of its highly toxic nature and ubiquity in surface Water. This study thus aims to derive the criteria for ammonia in freshWater to protect aquatic life because there are no Water Quality criteria for ammonia in Korea. Short-term lethal tests were conducted to perform the species sensitivity distribution (SSD) method. This method is widely used in ecological risk assessment to determine the chemical concentrations to protect aquatic species. Based on the species sensitivity distribution method using Korean indigenous aquatic biota, the hazardous concentration for 5% of biological species (HC5) value calculated in this study was 44 mg/L as total ammonia nitrogen (TAN). The value of the assessment factor was set at 2. Consequently, the criteria for ammonia were derived as 22 mg/L at pH 7 and 20 °C. When the derived value was applied to the monitoring data nationwide, 0.51%, 0.09%, 0.18%, 0.20%, and 0.35% of the monitoring sites in Han River, Nakdong River, Geum River, Youngsan River, and lakes throughout the nation, respectively, exceeded this criteria. The Ministry of Environment in Korea has been considering introducing Water Quality Standard of ammonia for protecting aquatic life. Therefore, our results can provide the basis for introducing the ammonia Standard in Korea.
Janaki Ballav Swain - One of the best experts on this subject based on the ideXlab platform.
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Modified heavy metal Pollution index (m-HPI) for surface Water Quality in river basins, India
Environmental Science and Pollution Research, 2020Co-Authors: Mrunmayee Manjari Sahoo, Janaki Ballav SwainAbstract:India is bestowed with huge amount of surface Water resources. However, India lacks the Quality monitoring of surface Water and comprehensive management for sustainable surface Water development. A new approach for indexing has been proposed to represent pollution due to heavy metals in surface Water. Heavy metal pollution indices (m-HPI) for 60 surface Water samples in the peninsular stretch were evaluated during pre-drought, drought and post-drought condition. The Index will be represented by a Positive Index (PI) and a Negative Index (NI), where PI represents the level pollution exceeding the maximum desirable limit and NI reflects the index within the required limit. The PI is assigned as 0 when indicators are present below the detection limit or equal to the maximum required limit. However, the value calculated for NI could be 0 to −1 when the indicators are equal to or less than the suggested maximum desirable limit, and the value could be −1 when the indicators are present below the suggested detection limit. The spatiotemporal variation of Water Quality pattern was studied by the interpolation maps extracted from ArcGIS. The results are compared with WHO Standard to validate the drinking Water Quality. The calculated indices indicated the suitability of Water for domestic and irrigation purposes. The developed indexing system is user friendly, robust, flexible and may evaluate the index considering any Water Quality Standard.
Yuwei Chen - One of the best experts on this subject based on the ideXlab platform.
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Water Quality assessment based on the Water Quality index method in lake poyang the largest freshWater lake in china
Scientific Reports, 2017Co-Authors: Zhaoshi Wu, Dawen Zhang, Xiaolong Wang, Lu Zhang, Yuwei ChenAbstract:Twenty-four samplings were conducted every 3 months at 15 sites from January 2009 to October 2014 in Lake Poyang, and 20 parameters were analyzed and classified into three groups (toxic metals, easily treated parameters, and others). The assessment results based on Water Quality index (WQI) showed that the Water Quality in Lake Poyang was generally “moderate”, according to the classification of the surface Water Quality Standard (GB3838-2002) in China, but a deteriorating trend was observed at the interannual scale. Seasonally, the Water Quality was best in summer and worst in winter. Easily treated parameters generally determined the WQI value in the assessment, especially total nitrogen (TN) and total phosphorus (TP), while toxic metals and other parameters in Lake Poyang were generally at low and safe levels for drinking Water. Water level (WL) has a net positive effect on Water Quality in Lake Poyang through dilution of environmental parameters, which in practice means TN. Consequently, local management agencies should pay more attention to nutrient concentrations during the monitoring schedule, as well as during the low-Water periods which manifest a relatively bad Water Quality state, especially with the prevailing low WL observed recently in Lake Poyang.
