scholarly journals Research on Rainwater Runoff Pollution in Different Blocks in Xi’an

2021 ◽  
Vol 826 (1) ◽  
pp. 012009
Author(s):  
Rubin Jia ◽  
Jian Li ◽  
Yong Wang ◽  
Di Tang ◽  
Lei Tian ◽  
...  
Keyword(s):  
Rainwater Runoff ◽  
Runoff Pollution

scholarly journals Simulation of Urban Storm Water Runoff Control Based on Big Data

2021 ◽  
Vol 2066 (1) ◽  
pp. 012076
Author(s):  
Yunzhu Liu ◽  
Jinbao Cao
Keyword(s):  
Pollution Control ◽  
Storm Water ◽  
Water Runoff ◽  
Control Effect ◽  
Storm Water Runoff ◽  
Rainwater Runoff ◽  
Runoff Control ◽  
Runoff Pollution Control ◽  
Urban Storm ◽  
Runoff Pollution

Abstract The acceleration of urbanization has brought about rapid economic development, but at the same time, it has also brought some damage to the ecological environment. The proportion of hardened area of the ground is higher and higher, and the rainwater runoff pollution caused by rainfall is more and more serious. In order to follow the sustainable development strategy, and for the more stable and high-speed economic development, the control of rainwater runoff pollution is urgent. The purpose of this paper is to simulate the urban storm water runoff control and find the most suitable scheme for storm water runoff pollution control. Because the simulation of SWMM is more accurate than other models, it can directly reflect the situation of rainwater runoff pollution, so the model selected for rainwater runoff in this paper is SWMM, and then build the model, through the collection and collation of the basic data of the study area, the generalization of the sub catchment area and drainage network is completed. Through the analysis of the characteristics of the study area, the rainwater garden and permeable pavement are determined as the scheme to control the rainwater runoff in the study area. Finally, the SWMM model is used to simulate the control effect of rainwater garden and pervious pavement on rainwater runoff pollution control. The experimental results show that the storm water garden can effectively control the impact of SS scouring effect on the environment, significantly reduce the discharge of SS, and significantly reduce the peak concentration of SS, and its ability to control SS increases with the thickness of the surface plant layer. The control ability of rain permeable brick pavement to SS increases with the increase of surface porosity, that is, the control effect of SS is the best when the porosity is 20%.

scholarly journals Emission Characteristic Analysis on Highway Rainwater Runoff Pollution of Asphalt Pavement

2018 ◽  
Vol 186 ◽  
pp. 012001
Author(s):  
Tao Shuangcheng ◽  
Xiong Xinzhu ◽  
Li Lingyun ◽  
Chen Chengyong ◽  
Li Hua ◽  
...  
Keyword(s):  
Asphalt Pavement ◽  
Emission Characteristic ◽  
Characteristic Analysis ◽  
Rainwater Runoff ◽  
Runoff Pollution

scholarly journals Analysis on utilization of sponge city in architectural planning and design

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
Xiong Di
Keyword(s):  
Water Resources ◽  
Construction Planning ◽  
Sponge City ◽  
The Core ◽  
Planning And Design ◽  
Rainwater Runoff ◽  
Architectural Planning ◽  
Runoff Pollution

Abstract: At this present stage, the national economy is developing rapidly, the level of productivity is constantly upgrading, and the pace of urbanization is accelerating, but inevitably, there are many problems in the process of urban construction, such as serious shortage of water resources,rainwater runoff pollution,underground drainage system and unreasonable urban construction planning, so the proposal of sponge city has solved these problems effectively. The core of the sponge city is to save water resources by reducing the demand of water resources in the traditional urbanization process, and improve the whole quality of the existing water resources, balancing the whole city ecological system. Based on this, this paper analyzes and explores the use of sponge city in architectural planning and design in detail.

Incorporating concepts from physical theory into stochastic modelling of urban runoff pollution

1998 ◽  
Vol 37 (1) ◽  
pp. 179-185
Author(s):  
Morten Grum
Keyword(s):  
Stochastic Model ◽  
Continuous Time ◽  
Measurement Errors ◽  
Physical Theory ◽  
Oxygen Demand ◽  
Stochastic Modelling ◽  
Urban Runoff ◽  
Primary Input ◽  
Deterministic Modelling ◽  
Runoff Pollution

On evaluating the present or future state of integrated urban water systems, sewer drainage models, with rainfall as primary input, are often used to calculate the expected return periods of given detrimental acute pollution events and the uncertainty thereof. The model studied in the present paper incorporates notions of physical theory in a stochastic model of water level and particulate chemical oxygen demand (COD) at the overflow point of a Dutch combined sewer system. A stochastic model based on physical mechanisms has been formulated in continuous time. The extended Kalman filter has been used in conjunction with a maximum likelihood criteria and a non-linear state space formulation to decompose the error term into system noise terms and measurement errors. The bias generally obtained in deterministic modelling, by invariably and often inappropriately assuming all error to result from measurement inaccuracies, is thus avoided. Continuous time stochastic modelling incorporating physical, chemical and biological theory presents a possible modelling alternative. These preliminary results suggest that further work is needed in order to fully appreciate the method's potential and limitations in the field of urban runoff pollution modelling.

scholarly journals Is the Microfiltration Process Suitable as a Method of Removing Suspended Solids from Rainwater?

Resources ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 21
Author(s):  
Karolina Fitobór ◽  
Bernard Quant
Keyword(s):  
Suspended Solids ◽  
Rainwater Harvesting ◽  
Anthropogenic Pressure ◽  
Granulometric Analysis ◽  
Suspended Substances ◽  
Rainwater Runoff ◽  
Rainwater Management ◽  
Alternative Sources ◽  
Average Size ◽  
Silt Density Index

Due to climate change and anthropogenic pressure, freshwater availability is declining in areas where it has not been noticeable so far. As a result, the demands for alternative sources of safe drinking water and effective methods of purification are growing. A solution worth considering is the treatment of rainwater by microfiltration. This study presents the results of selected analyses of rainwater runoff, collected from the roof surface of individual households equipped with the rainwater harvesting system. The method of rainwater management and research location (rural area) influenced the low content of suspended substances (TSS < 0.02 mg/L) and turbidity (<4 NTU). Microfiltration allowed for the further removal of suspension particles with sizes larger than 0.45 μm and with efficiency greater than 60%. Granulometric analysis indicated that physical properties of suspended particles vary with the season and weather. During spring, particles with an average size of 500 μm predominated, while in autumn particles were much smaller (10 μm). However, Silt Density Index measurements confirmed that even a small amount of suspended solids can contribute to the fouling of membranes (SDI > 5). Therefore, rainwater cannot be purified by microfiltration without an appropriate pretreatment.

scholarly journals Addressing the Water–Energy–Food Nexus through Enhanced Green Roof Performance

2021 ◽  
Vol 13 (4) ◽  
pp. 1972
Author(s):  
Jeremy Wright ◽  
Jeremy Lytle ◽  
Devon Santillo ◽  
Luzalen Marcos ◽  
Kristiina Valter Mai
Keyword(s):  
Climate Change ◽  
Performance Optimization ◽  
Urban Areas ◽  
Stormwater Management ◽  
Green Roof ◽  
Green Roofs ◽  
Management Tool ◽  
Contributing Factors ◽  
Rainwater Runoff ◽  
Rain Events

Urban densification and climate change are creating a multitude of issues for cities around the globe. Contributing factors include increased impervious surfaces that result in poor stormwater management, rising urban temperatures, poor air quality, and a lack of available green space. In the context of volatile weather, there are growing concerns regarding the effects of increased intense rainfalls and how they affect highly populated areas. Green roofs are becoming a stormwater management tool, occupying a growing area of urban roof space in many developed cities. In addition to the water-centric approach to the implementation of green roofs, these systems offer a multitude of benefits across the urban water–energy–food nexus. This paper provides insight to green roof systems available that can be utilized as tools to mitigate the effects of climate change in urbanized areas. A new array of green roof testing modules is presented along with research methods employed to address current issues related to food, energy and water performance optimization. Rainwater runoff after three rain events was observed to be reduced commensurate with the presence of a blue roof retention membrane in the testbed, the growing media depth and type, as well as the productive nature of the plants in the testbed. Preliminary observations indicate that more productive green roof systems may have increasingly positive benefits across the water–energy–food nexus in dense urban areas that are vulnerable to climate disruption.

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