Pollution Load Capacity Calculation Study Based on Multi-objective System in Trans-boundary Area, Plain River Network

Xiao, Wang; Pang, Min; Zhao, Mingzhi

doi:10.1007/s00128-020-03068-5

Cited by 3 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We realize that important steps had been made toward improved understanding the environmental impacts of N pollution on water systems and associated pollution management by abundant local scale studies. These studies have generally provided more detailed spatial and temporal level of pollution status and associated source attribution by two types of approaches: site-level measurements, stable isotopes combined with statistical analysis − (e.g., Bayesian analysis and 1-D mathematical equation for environmental capacity calculation) or small-scale process-based models − such as SWAT and GBNP . However, providing such detailed-level assessments for the whole of China is theoretically possible but practically not feasible yet, as it requires substantial input data and measurements for calibration and validation.…”

Section: Resultsmentioning

confidence: 99%

Keeping Nitrogen Use in China within the Planetary Boundary Using a Spatially Explicit Approach

Chen,

Strokal,

van Vliet

et al. 2024

Environ. Sci. Technol.

View full text Add to dashboard Cite

Nitrogen (N) supports food production, but its excess causes water pollution. We lack an understanding of the boundary of N for water quality while considering complex relationships between N inputs and in-stream N concentrations. Our knowledge is limited to regional reduction targets to secure food production. Here, we aim to derive a spatially explicit boundary of N inputs to rivers for surface water quality using a bottom-up approach and to explore ways to meet the derived N boundary while considering the associated impacts on both surface water quality and food production in China. We modified a multiscale nutrient modeling system simulating around 6.5 Tg of N inputs to rivers that are allowed for whole of China in 2012. Maximum allowed N inputs to rivers are higher for intensive food production regions and lower for highly urbanized regions. When fertilizer and manure use is reduced, 45–76% of the streams could meet the N water quality threshold under different scenarios. A comparison of “water quality first” and “food production first” scenarios indicates that trade-offs between water quality and food production exist in 2–8% of the streams, which may put 7–28% of crop production at stake. Our insights could support region-specific policies for improving water quality.

show abstract

Section: Resultsmentioning

confidence: 99%

Keeping Nitrogen Use in China within the Planetary Boundary Using a Spatially Explicit Approach

Chen,

Strokal,

van Vliet

et al. 2024

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Because of the complex geological conditions and many influencing factors in lava area, the experimental analysis of bridge engineering in karst area is carried out, and the calculation algorithm of vertical capacity of rock jacket pile in karst area by load transfer method is established [11]. The pollution load of plain river network is difficult to control, so a multi-objective system with multiple constraints is proposed, and the corresponding one-dimensional and 0-d models are established to calculate the load capacity [12]. Tower foundations in transmission line projects in western China are often affected by extreme weather.…”

Section: Introductionmentioning

confidence: 99%

Application of Multimedia Virtual Technology in Mechanical Engineering Display Design

2023

AJETS

View full text Add to dashboard Cite

Virtualization technology is one of the high and new technologies nowadays, and it is extremely important for the design of application products and mechanical objects. This provides a good design platform and development space for designers of application products and mechanical structures, more clearly and intuitively, it shows a self-virtualized simulation scene of people's future virtual products and mechanical engineering models, unknown virtual products and mechanical engineering models, ideal virtual products and mechanical engineering models or all real things that people imagine creating and show. The interaction between mobile virtual and reality is constantly developed and respected, and the man-machine interaction operation mode is realized. This paper introduces the system dynamics formula of the barge system in the upper block on the offshore electric platform and the calculation of acceleration and inertia force in its inertial load. In the virtual system, the dynamic model is used to calculate the kinetic energy and potential energy of mechanical engineering, and the algorithm model is applied to the angle and acceleration of joints on the robot. Three kinds of network models are simplified by simplification algorithm, and the models are compared in two aspects of visual geometry error and visual error. Finally, the video quality is reacted by different users, and the model performance is compared.

show abstract

A Multi-Objective Decision Model for Water Pollution Load Allocation under Uncertainty

Zhou

Sun

Chen

et al. 2023

Water

View full text Add to dashboard Cite

In order to control the discharge of regional total pollutants in the region and improve the ability of water environment management and decision making, a multi-objective decision-making optimization model of water pollution load allocation was constructed, which took into account economy and fairness. The model takes the maximum environmental benefit and the minimum weighted comprehensive Gini coefficient as the objective function and takes into account the uncertainty and multi-objectives of the model, which is conducive to promoting economic development and ensuring the fairness of regional water pollutant discharge. A method based on Monte Carlo simulation coupled with a genetic algorithm was designed to obtain the optimal solution set through multiple simulation optimization. This model is applied to Anhui Province to solve the allocation optimization problem of total pollutant reduction in the 13th Five-Year Energy Conservation and Emission Reduction Plan. After the optimization of water pollution load distribution, the comprehensive Gini coefficients of COD and NH3-N are reduced by different ranges. The comprehensive Gini coefficient after COD optimization decreased by 2.4–4.6%, and the comprehensive Gini coefficient after NH3-N optimization decreased by 25.1–32.5%, which verified the feasibility and rationality of the model in the optimal allocation of the total discharge of regional water pollutants. The model takes into account uncertain subjective and objective factors that have an important impact on water pollutant discharge targets and decision variables, thus optimizing the total emissions of the entire regional control unit in both space and time.

show abstract

Pollution Load Capacity Calculation Study Based on Multi-objective System in Trans-boundary Area, Plain River Network

Cited by 3 publications

References 14 publications

Keeping Nitrogen Use in China within the Planetary Boundary Using a Spatially Explicit Approach

Keeping Nitrogen Use in China within the Planetary Boundary Using a Spatially Explicit Approach

Application of Multimedia Virtual Technology in Mechanical Engineering Display Design

A Multi-Objective Decision Model for Water Pollution Load Allocation under Uncertainty

Contact Info

Product

Resources

About