The Experts below are selected from a list of 3678 Experts worldwide ranked by ideXlab platform
G H Huang - One of the best experts on this subject based on the ideXlab platform.
-
an inexact simulation based stochastic optimization method for identifying effluent trading strategies of agricultural Nonpoint Sources
Agricultural Water Management, 2015Co-Authors: J L Zhang, C X Wang, G H HuangAbstract:Agricultural Nonpoint Sources (NPS) pollution has long been regarded as the leading challenge in maintaining water quality of receiving water bodies. Effluent trading can serve as a cost-effective way to achieve optimal configuration of discharge permits in agricultural NPS pollution control. However, great difficulties exist in practical effluent trading planning, including uncertainties related to randomness and imprecision, system risk of nutrient loadings being unacceptably high, and factors with spatiotemporal heterogeneity within the watershed. In this study, an inexact simulation-based stochastic optimization method (ISSOM) is developed for identifying effluent trading strategies in response to the above challenges. With the aid of technique of interval analysis, uncertain parameters related to nutrient yields can be handled and dynamic variation of NPS contaminant loadings can be reasonably addressed. Besides, ISSOM can tackle uncertainties expressed as fuzzy, stochastic and interval formats and capture the notion of risk under high-variability situation in NPS pollution control. The ISSOM is applied to a real case of agricultural NPS pollution mitigation through effluent trading in Xiangxihe Watershed. Results show that the uncertainties play a major role in successfully launching an effluent trading program, and trading scheme can mitigate agricultural NPS pollution with an increased system benefit. Results also reveal that the agricultural zones of Xiakou and Gufu are the major pollution Sources and main purchasers in effluent trading, and Guizhou zone is the main vendor which contributes least to nutrient discharge. These findings can not only facilitate identification of the main pollution Sources and optimal effluent trading schemes, but also gain insight into the tradeoff among the agricultural benefit, system risk, and satisfaction degree.
-
a recourse based interval fuzzy programming model for point Nonpoint source effluent trading under uncertainty
Journal of The American Water Resources Association, 2014Co-Authors: G H Huang, J LiuAbstract:In this study, a recourse-based interval fuzzy programming (RIFP) model is developed for tackling uncertainties expressed as fuzzy, interval, and/or probabilistic forms in an effluent trading program. It can incorporate preregulated water-pollution control policies directly into its optimization process, such that an effective linkage between environmental regulations and economic implications (i.e., penalties) caused by improper policies due to uncertainty existence can be provided. The RIFP model is applied to point-Nonpoint source effluent trading of the Xiangxi River in China. The efficiency of trading efforts between water quality improvement and net system benefit under different degrees of satisfying discharge limits is analyzed. The results are able to help support (1) formulation of water-pollution control strategies under various economic objectives and system-reliability constraints, (2) selection of the desired effluent trading pattern for point and Nonpoint Sources, and (3) generation of tradeoffs among system benefit, satisfaction degree, and pollutant mitigation under multiple uncertainties. Compared with the traditional regulatory approaches, the results demonstrate that the water-pollution control program can be performed more cost-effectively through trading than nontrading.
Ghassan Chebbo - One of the best experts on this subject based on the ideXlab platform.
-
Nonpoint source pollution of urban stormwater runoff: a methodology for source analysis
Environmental Science and Pollution Research, 2014Co-Authors: Guido Petrucci, Marie-christine Gromaire, Masoud Fallah Shorshani, Ghassan ChebboAbstract:The characterization and control of runoff pollution from Nonpoint Sources in urban areas are a major issue for the protection of aquatic environments. We propose a methodology to quantify the Sources of pollutants in an urban catchment and to analyze the associated uncertainties. After describing the methodology, we illustrate it through an application to the Sources of Cu, Pb, Zn, and polycyclic aromatic hydrocarbons (PAH) from a residential catchment (228 ha) in the Paris region. In this application, we suggest several procedures that can be applied for the analysis of other pollutants in different catchments, including an estimation of the total extent of roof accessories (gutters and downspouts, watertight joints and valleys) in a catchment. These accessories result as the major source of Pb and as an important source of Zn in the example catchment, while activity-related Sources (traffic, heating) are dominant for Cu (brake pad wear) and PAH (tire wear, atmospheric deposition).
John S Gulliver - One of the best experts on this subject based on the ideXlab platform.
-
perfluoroalkyl acids in urban stormwater runoff influence of land use
Water Research, 2012Co-Authors: Feng Xiao, Matt F Simcik, John S GulliverAbstract:Perfluoroalkyl acids (PFAAs) are persistent organic pollutants in the environment and have been reported to have Nonpoint Sources. In this study, six PFAAs with different chain lengths were monitored in stormwater runoff from seven storm events (2009-2011) at various outfall locations corresponding to different watershed land uses. We found PFAA(s) in 100% of stormwater runoff samples. Monitoring results and statistical analysis show that PFAAs in stormwater runoff from residential areas mainly came from rainfall. On the other hand, non-atmospheric Sources at both industrial and commercial areas contributed PFAAs in stormwater runoff. The mass flux of PFAAs from stormwater runoff in the Twin Cities (Minneapolis and St. Paul, MN) metropolitan area is estimated to be about 7.86 kg/year. In addition, for the first time, we monitored PFAAs on the particles/debris in stormwater runoff and found high-level PFOS on the particulate matter in runoff collected from both industrial and commercial areas; the levels were so high that the finding could not be explained by the solid-water partitioning or adsorption. PFOS on the particulate matter is suspected to have originated from industrial/commercial products, entering the waste stream as PFOS containing particles.
Dongqin Gong - One of the best experts on this subject based on the ideXlab platform.
-
combined inverse modeling approach and load duration curve method for variable nitrogen total maximum daily load development in an agricultural watershed
Environmental Science and Pollution Research, 2011Co-Authors: Dingjiang Chen, Hailong Wang, Yena Shen, Dongqin GongAbstract:Purpose Nonpoint Sources (NPS) pollution has been an important cause for water quality impairment worldwide. To take the temporal variations of both NPS pollution and in-stream attenuation into consideration, an inverse modeling approach and the load duration curve (LDC) method were combined for variable nutrient total maximum daily load (TMDL) development.
Guido Petrucci - One of the best experts on this subject based on the ideXlab platform.
-
Nonpoint source pollution of urban stormwater runoff: a methodology for source analysis
Environmental Science and Pollution Research, 2014Co-Authors: Guido Petrucci, Marie-christine Gromaire, Masoud Fallah Shorshani, Ghassan ChebboAbstract:The characterization and control of runoff pollution from Nonpoint Sources in urban areas are a major issue for the protection of aquatic environments. We propose a methodology to quantify the Sources of pollutants in an urban catchment and to analyze the associated uncertainties. After describing the methodology, we illustrate it through an application to the Sources of Cu, Pb, Zn, and polycyclic aromatic hydrocarbons (PAH) from a residential catchment (228 ha) in the Paris region. In this application, we suggest several procedures that can be applied for the analysis of other pollutants in different catchments, including an estimation of the total extent of roof accessories (gutters and downspouts, watertight joints and valleys) in a catchment. These accessories result as the major source of Pb and as an important source of Zn in the example catchment, while activity-related Sources (traffic, heating) are dominant for Cu (brake pad wear) and PAH (tire wear, atmospheric deposition).
