Research on Water Environment Situation and Regulation Progress of Urban Lakes

Lakes in Hanoi play an important role in local human life. However, along with the economic and social development, some urban lakes have been polluted, especially organic pollution. This paper presents the monthly survey results for organic pollution assessment of ten selected lakes in Ha Noi city: the Ho Tay, Truc Bach, Thien Quang, Ba Mau, Bay Mau, Hoan Kiem, Ngoc Khanh, Giang Vo, Thanh Cong and Thu Le lakes during the period from March 2014 to February 2015. The survey results showed that the Ba Mau lake was organic polluted at level IV whereas other lakes were contaminated by organic matters at level III. Organic pollution may come from both autochthonous and allochthonous sources. Compared with the results of previous studies, the water quality of 10 lakes in the period from March 2014 to February 2015 has been improved thank for the recent application of some positive solutions for lake environmental protection. Hệ thống hồ ở Hà Nội đóng vai trò quan trọng trong đời sống của người dân. Tuy nhiên, cùng với sự phát triển kinh tế xã hội, nhiều hồ trong nội đô đã và đang bị ô nhiễm, đặc biệt là ô nhiễm hữu cơ. Bài báo này trình bày kết quả khảo sát ô nhiễm hữu cơ tại 10 hồ trong thành phố Hà Nội: hồ Tây, Trúc Bạch, Thiền Quang, Ba Mẫu, Bảy Mẫu, Hoàn Kiếm, Ngọc Khánh, Giảng Võ, Thành Công và Thủ Lệ trong thời gian từ tháng 3 năm 2014 đến tháng 2 năm 2015. Kết quả khảo sát cho thấy hồ Ba Mẫu bị ô nhiễm hữu cơ ở mức IV, các hồ còn lại bị ô nhiễm hữu cơ ở mức III. Ô nhiễm hữu cơ tại các hồ có thể do cả hai nguồn cung cấp chất hữu cơ, ngoại lai và nội sinh. So với kết quả quan trắc trước đây, chất lượng nước 10 hồ Hà Nội đã được cải thiện do gần đây đã áp dụng một số biện pháp bảo vệ môi trường cho các hồ.

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Preliminary Exploration on Landscape Planning around Lake Zone in the City

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.716-717.260 ◽

2014 ◽

Vol 716-717 ◽

pp. 260-264

Author(s):

Hong Gang Yang ◽

Cong Huang ◽

Ying Wang ◽

Fei Yu Wang ◽

Hong Li Sun ◽

...

Keyword(s):

Landscape Planning ◽

Water Environment ◽

Ecological Perspective ◽

Urban Lakes ◽

Lake Zone ◽

Terrestrial Water ◽

Development And Utilization ◽

Urbanization In China ◽

The City

Urban lakes are an important part of water environment, not only providing a place for people to entertain, but also one of the higher value services ecosystem. With the accelerating pace of urbanization in China, the development and utilization of resources increasingly strengthened urban lakes, thus sustainably creating lakes landscape is extremely urgent. In this paper, by taking NiuShan Technology Eco-City as a case study, ecological, geographical, social, functional and economic principles are proposed. From a landscape, environmental and ecological perspective, and according to the order of terrestrial water landscape among other aspects, it primarily explores landscape planning around lake zones in the city.

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Establishing an empirical equation for the relationship between total suspended solids and total phosphorus concentrations in the downstream Red river water

Tạp chí Khoa học và Công nghệ Biển ◽

10.15625/1859-3097/20/3/14789 ◽

2020 ◽

Vol 20 (3) ◽

pp. 325-332

Author(s):

Le Nhu Da ◽

Le Thi Phuong Quynh ◽

Phung Thi Xuan Binh ◽

Duong Thi Thuy ◽

Trinh Hoai Thu ◽

...

Keyword(s):

Total Phosphorus ◽

Suspended Solids ◽

Empirical Relationship ◽

Water Environment ◽

Total Suspended Solids ◽

River System ◽

Red River ◽

Reservoir Impoundment ◽

Downstream Section ◽

Reasonable Prediction

Recently, the Asian rivers have faced the strong reduction of riverine total suspended solids (TSS) flux due to numerous dam/reservoir impoundment. The Red river system is a typical example of the Southeast Asian rivers that has been strongly impacted by reservoir impoundment in both China and Vietnam, especially in the recent period. It is known that the reduction in total suspended solids may lead to the decrease of some associated elements, including nutrients (N, P, Si) which may affect coastal ecosystems. In this paper, we establish the empirical relationship between total suspended solids and total phosphorus concentrations in water environment of the Red river in its downstream section from Hanoi city to the Ba Lat estuary based on the sampling campaigns conducted in the dry and wet seasons in 2017, 2018 and 2019. The results show a clear relationship with significant coefficient between total suspended solids and total phosphorus in the downstream Red river. It is expressed by a simple equation y = 0.0226x0.3867 where x and y stand for total suspended solids and total phosphorus concentrations (mg/l) respectively with the r2 value of 0.757. This equation enables a reasonable prediction of total phosphorus concentrations of the downstream Red river when the observed data of total suspended solids concentrations are available. Thus, this work opens up the way for further studies on the calculation of the total phosphorus over longer timescales using daily available total suspended solids values.

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DEVELOPMENT OF INTEGRATED MONITORING NETWORK FOR MEASURING SALINITY OF SEA WATER

VESTNIK OF ASTRAKHAN STATE TECHNICAL UNIVERSITY SERIES MANAGEMENT COMPUTER SCIENCE AND INFORMATICS ◽

10.24143/2072-9502-2018-1-18-26 ◽

2018 ◽

pp. 18-26

Author(s):

Sima Ajdar qizi Askerova

Keyword(s):

Surface Waters ◽

Sea Water ◽

Water Environment ◽

Monitoring Network ◽

Monitoring Networks ◽

The Caspian Sea ◽

Integrated Monitoring ◽

Ecological Control ◽

Different Depths ◽

Optimal Construction

Monitoring of sea water condition is one of major requirements for carrying out the reliable ecological control of water environment. Monitoring networks contain such elements as sea buoys, beacons, etc. and are designated for measuringvarious hydrophysical parameters, including salinity of sea water. Development of specialized network and a separate buoy system for measuring thesea water salinity at different depths makes it possible to determine major regularities of processes of pollution and self-recovery of the sea waters. The article describes the scientific and methodological basics for development of this specialized network and questions of its optimal construction. It is well-known that at a depth of 30-45 m of the Caspian Sea salinity decreases and then at a depth of 45-60 m salinity is fully recovered. The mentioned changes of salinity at the relatively upper layer of sea waters is of special interest for studying the effect of ocean-going processes on the climate forming in the Caspian area. In terms of informativeness of measurements of surface waters salinity, the most informative is a layer ata 30-60 m depth, where inversion and recovery of salinity take place. It is shown that in most informative subrange of measurements, i. e. at a depth of 30-60 m optimization of regime of measurements complex should be carried out in order to increase the effectiveness of held researches. It is shown that at a depth of 35-50 m choice of the optimum regime of measurements makes it possible to obtain the maximum amount of information.

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The effect of water environment subjected to global warming

Manufacture Engineering and Environment Engineering ◽

10.2495/meee20130891 ◽

2013 ◽

Author(s):

Mengjie Chen ◽

Zaifu Yang

Keyword(s):

Global Warming ◽

Water Environment ◽

Effect Of Water

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CORRELATION OF MICROCYSTINS AND WATER ENVIRONMENT FACTORS IN MIYUN RESERVOIR OF BEIJING, CHINA

Environmental Engineering and Management Journal ◽

10.30638/eemj.2011.118 ◽

2011 ◽

Vol 10 (6) ◽

pp. 849-853 ◽

Cited By ~ 1

Author(s):

Guisen Du ◽

Huimin Li ◽

Yumei Wu ◽

Dianwei Wu ◽

Jingshi Wang

Keyword(s):

Water Environment ◽

Miyun Reservoir ◽

Environment Factors ◽

Beijing China

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PERBANDINGAN METODE HOMOMORPHIC FILTERING DAN METODE CONTRAST STRECHING UNTUK PERBAIKAN KUALITAS CITRA UNDERWATER

KOMIK (Konferensi Nasional Teknologi Informasi dan Komputer) ◽

10.30865/komik.v2i1.928 ◽

2018 ◽

Vol 2 (1) ◽

Author(s):

Adi Mora Lubis ◽

Nelly Astuti Hasibuan ◽

Imam Saputra

Keyword(s):

Digital Image ◽

Water Environment ◽

Repair Process ◽

Image Process ◽

Two Dimensional ◽

Two Dimensional Image ◽

Underwater Image ◽

Homomorphic Filtering ◽

Contrast Stretching

Digital imagery is a two-dimensional image process through a digital computer that is used to manipulate and modify images in various ways. Photos are examples of two-dimensional images that can be processed easily. Each photo in the form of a digital image can be processed through a specific software. In the water environment, the light factor greatly influences the results of the quality of the image obtained. With the deepening of underwater shooting, the results obtained will be the darker the quality of the underwater image. . uneven lighting and bluish tones. One of the factors that influence the recognition results in pattern recognition is the quality of the image that is inputted. The image acquired from the source does not always have good quality. The process of repairing digital images that experience interference in lighting. The lighting repair process uses homomorphic filtering and uses contrast striching and will compare the quality of both methods and test to prove the results of image quality between homomorphic filtering and contrast streching. Until later the results of both methods can be seen which is better. homomorphic filtering and contrast stretching can produce image improvements with pretty good performance.Keywords: Digital Image, Underwater Image, Homomorphic Filtering, Contrast Streching, Matlab R2010a

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IMPLEMENTASI METODE RETINEX UNTUK MENINGKATKAN KUALITAS CITRA UNDERWATER

KOMIK (Konferensi Nasional Teknologi Informasi dan Komputer) ◽

10.30865/komik.v2i1.953 ◽

2018 ◽

Vol 2 (1) ◽

Author(s):

Bainun Harahap

Keyword(s):

Water Environment ◽

Repair Process ◽

Image Process ◽

Two Dimensional ◽

Two Dimensional Image ◽

Underwater Image ◽

Object Search ◽

Image Improvement ◽

Underwater Object

Digital imagery is a two-dimensional image process through a digital computer that is used to manipulate and modify images in various ways. Photos are examples of two-dimensional images that can be processed easily. Each photo in the form of a digital image can be processed through certain software devices. In the water environment, light factors greatly influence the results of image quality obtained. With the deepening of underwater shooting, the results obtained will be the darker the quality of the underwater image. Underwater imagery is widely used as an object in various activities such as underwater habitat mapping, underwater environment monitoring, underwater object search. Uneven lighting and colors that tend to be bluish and runny. One of the factors that influence the recognition results in pattern recognition is the quality of the image that is inputted. The image acquired from the source does not always have good quality. The process of improvement in digital images that experience interference in lighting and exposure to sunlight. The lighting repair process uses the retinex method and will compare the quality of the two methods later. Until later the results of both methods can be seen which is better. Retinex method can produce image improvement with high performance.Keywords: Digital Cintra, Underwater, Matlab Retinex Method

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Environmental significance of atrazine in aqueous systems and its removal by biological processes: an overview

Global NEST Journal ◽

10.30955/gnj.000306 ◽

2013 ◽

Vol 8 (2) ◽

pp. 159-178 ◽

Cited By ~ 2

Keyword(s):

Drinking Water ◽

Ground Water ◽

Water Environment ◽

Biological Processes ◽

Biological Degradation ◽

Environmental Significance ◽

Carbon And Nitrogen ◽

Carbon Nitrogen Ratio ◽

Nitrogen Ratio ◽

Living Organisms

Atrazine, a chlorinated s-triazine group of herbicide is one of the most widely used pesticides in the World. Due to its extensive use, long half-life and various toxic properties, it has very high environmental significance. Up to 22 mg l-1 of atrazine was found in ground water whereas permissible limit of atrazine is in ppb level in drinking water. As per Indian standard there should not be any pesticide present in drinking water. Among many other treatment processes available, Incineration, adsorption, chemical treatment, phytoremediation and biodegradation are the most commonly used ones. Biological degradation of atrazine depends upon various factors like the operating environment, external carbon and nitrogen sources, carbon/ nitrogen ratio (C/N), water content and the bacterial strain. Although, general atrazine degradation pathways are available, the specific pathways in specific conditions are not yet clearly defined. In this paper extensive review has been made on the occurrence of atrazine in surface and ground water bodies, probable sources and causes of its occurrence in water environment, the toxicity of atrazine on various living organisms and its removal by biological processes.

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