scholarly journals Design and Development of Low P-Emission Substrate for the Protection of Urban Water Bodies Collecting Green Roof Runoff

2017 ◽  
Vol 9 (10) ◽  
pp. 1795 ◽  
Author(s):  
Agnieszka Karczmarczyk ◽  
Anna Baryła ◽  
Paweł Kożuchowski
Keyword(s):  
Green Roof ◽  
Water Bodies ◽  
Urban Water ◽  
Design And Development ◽  
Roof Runoff

scholarly journals A Machine Learning Approach for Estimating the Trophic State of Urban Waters Based on Remote Sensing and Environmental Factors

2021 ◽  
Vol 13 (13) ◽  
pp. 2498
Author(s):  
Shijie Zhu ◽  
Jingqiao Mao
Keyword(s):  
Remote Sensing ◽  
Environmental Factors ◽  
Water Temperature ◽  
Trophic State ◽  
Trophic Levels ◽  
Water Bodies ◽  
Trophic State Index ◽  
Urban Water ◽  
Estimation Model ◽  
Input Variables

To improve the accuracy of remotely sensed estimates of the trophic state index (TSI) of inland urban water bodies, key environmental factors (water temperature and wind field) were considered during the modelling process. Such environmental factors can be easily measured and display a strong correlation with TSI. Then, a backpropagation neural network (BP-NN) was applied to develop the TSI estimation model using remote sensing and environmental factors. The model was trained and validated using the TSI quantified by five water trophic indicators obtained for the period between 2018 and 2019, and then we selected the most appropriate combination of input variables according to the performance of the BP-NN. Our results demonstrate that the optimal performance can be obtained by combining the water temperature and single-band reflection values of Sentinel-2 satellite imagery as input variables (R2 = 0.922, RMSE = 3.256, MAPE = 2.494%, and classification accuracy rate = 86.364%). Finally, the spatial and temporal distribution of the aquatic trophic state over four months with different trophic levels was mapped in Gongqingcheng City using the TSI estimation model. In general, the predictive maps based on our proposed model show significant seasonal changes and spatial characteristics in the water trophic state, indicating the possibility of performing cost-effective, RS-based TSI estimation studies on complex urban water bodies elsewhere.

scholarly journals The landscaping of urban agglomeration park systems

Vestnik MGSU ◽  
2020 ◽  
pp. 294-306
Author(s):  
Aleksandra V. Ostyakova ◽  
Ekaterina V Pluisnina
Keyword(s):  
Water Body ◽  
Practical Importance ◽  
Pond Water ◽  
Water Bodies ◽  
Small Rivers ◽  
Urban Water ◽  
Normative Documents ◽  
Sources Of Pollution ◽  
City Water ◽  
Surrounding Areas

Introduction. Studying water body ecological problems and ensuring the necessary level of sanitary maintenance and landscaping of the reservoirs with the surrounding areas are relevant due to the inadequate environmental condition of a large number of urban water bodies and small rivers within settlements. Materials and methods. The review of the available normative documents and the carried-out actions on the improvement of city water objects is given. Based on the visual study of the state of the pond banks at the Karbyshev Park at the settlement of Nakhabino, Moscow region, water quality indicators, sources of pollution of the pond, the article concluded on the unsatisfactory ecological and aesthetic condition of this urban pond. The objective of this paper is to analyze the existing negative environmental factors affectig the water body and to propose an option of the site landscaping and further safe usage. Results. A description of the Karbyshev Park territory is given. Also, negative factors influencing the pollution of the pond banks, and the quality of pond water are specified. A proposal contains a list of necessary types of activities on cleaning and improving the pond bowl and surrounding territory under the condition of preservation of its ecosystem. As a result of the integrated assessment of the pond ecological state, a model of the urban water body was created, and a variant of its ecological reconstruction was proposed. Conclusions. The study is of practical importance for accounting and elimination of environmental problems of urban water bodies of the Central European Russia and proposals of measures for their improvement and reclamation.

scholarly journals Ecological engineering of small urban water bodies

2020 ◽  
Vol 157 ◽  
pp. 02026
Author(s):  
Antonina Suzdaleva ◽  
Anna Hirsch ◽  
Maria Kuchkina
Keyword(s):  
Ecological Engineering ◽  
Interdisciplinary Approach ◽  
Water Bodies ◽  
Urban Water ◽  
Prognostic Assessment ◽  
Technical Maintenance ◽  
Technical Systems ◽  
Positive Functions

The ecological and sanitary epidemiological condition of small urban water bodies is an important factor in ensuring safety in urbanized areas of the technosphere. All modern small urban water bodies are naturaltechnical systems that can be uncontrollable or controllable. In managed natural-technical systems, favorable environmental conditions are formed as a result of the operation of special engineering devices and systems called ecological regulators. Their creation and ensuring sustainable existence are the main goal of ecological engineering of small urban water bodiesThe choice of a strategy for the environmental engineering of water bodies should be determined on the basis of a prognostic assessment of the possibility of improving or maintaining its positive functions: videoecological, recreational, biotopical potential, and also cultural, historical or religious significance. In addition, it is necessary to take into account public opinion, which can be changed by disseminating positive information about the goals of the proposed activity (active ecological image-making). The issue of organizing long-term technical maintenance of ecological regulators and monitoring of natural-technical systems of water bodies is being considered. The paper provides a classification of small urban water bodies and a generalized scheme of their ecological engineering. The necessity of an interdisciplinary approach to decision making and the development of syncretic thinking in this area is substantiated.

Measurements of nutrients and mercury in green roof and gravel roof runoff

2014 ◽  
Vol 73 ◽  
pp. 705-712 ◽  
Author(s):  
Elizabeth G. Malcolm ◽  
Margaret L. Reese ◽  
Maynard H. Schaus ◽  
Ivy M. Ozmon ◽  
Lan M. Tran
Keyword(s):  
Green Roof ◽  
Roof Runoff
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