Assessment and Mechanisms of Water Eutrophication in Chaohu Lake, China

2010 ◽  
Vol 113-116 ◽  
pp. 1433-1438
Author(s):  
Qing Guang Liu ◽  
Zong Guang Diao ◽  
Jing Yu Sun
Keyword(s):  
Natural Condition ◽  
Domestic Wastewater ◽  
Water Area ◽  
Ecological Environment ◽  
Chaohu Lake ◽  
Chl A ◽  
Routine Sampling ◽  
And Control ◽  
Water Eutrophication ◽  
Point Pollution

Water eutrophication has become one of the most serious problems in Chaohu Lake problem in recent years, and understanding the mechanisms of water eutrophication in Western Chaohu Lake will help for prevention and remediation of water eutrophication. In this paper, we selected 6 routine sampling sites in the water area of Chaohu Lake. TP, TN, CODMn and Chl-a are chosen to describe the eutrophication of the Study area. The influencing factors and major mechanisms of water eutrophication were discussed. The reasons of eutrophication changes in Western Chaohu Lake are very complicated; consist of the suitable natural condition, the built of Yuxi Gate, the deteriorated watershed ecological environment and a great amount of pollutants discharged. The treatment and control of the industrial and domestic wastewater from Hefei City are essential to the treatment. More attention should be paid to the treatment of non-point pollution.

Removal of Phosphate Species from Solution by Adsorption onto Red and Grey Ceramic Clay Used as Adsorbent

2014 ◽  
Vol 675-677 ◽  
pp. 434-439
Author(s):  
Yi Liang Yao ◽  
Chang Yu Lu ◽  
Wie Sheng Guan ◽  
Hai Gang Gou ◽  
Wei Huang
Keyword(s):  
Waste Water ◽  
Low Cost ◽  
Phosphate Removal ◽  
Liquid Ratio ◽  
Phosphate Species ◽  
Water Problems ◽  
And Control ◽  
Water Eutrophication ◽  
Clay Materials ◽  
Ceramic Clay

Waste water is becoming more and more around us and phosphates exit everywhere in waste water. Eutrophication, the most common phenomenon caused by phosphate, can lead to water problems. Therefore, searching suitable materials to remove and control phosphate in waste water is of great significance. In this reach project, the method of adsorption was chosen to remove phosphate and two kinds of ceramic clay materials which were low cost and easily available as adsorbent for adsorption were used for phosphate removal. According to the removal efficiency of phosphate removal, temperature, solid to liquid ratio, the original concentration of phosphate and experiment time were studied in the experiments.

scholarly journals Indirect economic indicators in bio-economic fishery models: agricultural price indicators and fish stocks in Lake Victoria

2005 ◽  
Vol 62 (3) ◽  
pp. 483-492 ◽  
Author(s):  
Silvio Simonit ◽  
Charles Perrings
Keyword(s):  
Nutrient Loading ◽  
Agricultural Land ◽  
Lake Victoria ◽  
Leading Indicators ◽  
Fish Stocks ◽  
Chl A ◽  
Run Off ◽  
Fishery Model ◽  
Agricultural Price ◽  
Point Pollution

Abstract We consider the potential for using prices as leading indicators of changes in stocks and yields in the freshwater capture fishery in Lake Victoria. Fertilizer run-off from agricultural land is a major cause of nutrient loading, along with soil erosion, atmospheric deposition, and point pollution from industrial and domestic affluent. The interactions between fertilizer applications, water quality, fish stocks, and yields are modelled in order to predict the effect of changes in the price of fertilizers on the fishery. The fishery model includes a measure of Chl a concentration (a proxy for phytoplankton density). The consequences of changes in Chl a concentration for fish stocks are modelled using Ecopath. We show that fertilizer prices are effective leading indicators of changes in fish biomass and yield.

scholarly journals Study on comprehensive utilization and management of tunnel slag in Expressway

2020 ◽  
Vol 145 ◽  
pp. 02033
Author(s):  
Xiaodong Shang ◽  
Zhiqiang Liu ◽  
Jianhao Zheng ◽  
Wei Wang ◽  
Haifeng Jiang
Keyword(s):  
Project Planning ◽  
Ecological Environment ◽  
Utilization Rate ◽  
Scientific Management ◽  
Land Occupation ◽  
Comprehensive Utilization ◽  
And Control ◽  
Slag Waste

Based on the investigation of the comprehensive utilization technology of tunnel slag in expressway, the author finds that combining with the characteristics of the project, planning scientific management content, formulating reasonable utilization principles, and implementing the measures and control of the tunnel slag gravel yard and the waste slag yard can improve the recycling utilization rate of tunnel slag, reduce the amount of tunnel slag waste, reduce the land occupation and damage the ecological environment.

An Analysis about Wind Farm Construction Based on the Perspective of the Development of Ecological Environment

2013 ◽  
Vol 772 ◽  
pp. 619-621
Author(s):  
Zi Wei Bai
Keyword(s):  
Wind Power ◽  
Electromagnetic Interference ◽  
Wind Farm ◽  
Wind Farms ◽  
Control Measures ◽  
Ecological Environment ◽  
Public Attention ◽  
Natural Landscape ◽  
And Control ◽  
The Impact

Advantages of wind power are self-evident, but the impact of wind power project on the local ecological environment and natural landscape is also increasingly subject to public attention. It mainly reflects in the visual pollution of the wind turbine (or natural landscape problems), noise, bird safety and electromagnetic interference. The paper analyzed the impact of wind farms on the environment, and recommended appropriate preventions and control measures to reduce it to an acceptable level.

Key Technologies for Ecological Treatment on Livestock Feeding Residue

2013 ◽  
Vol 807-809 ◽  
pp. 1227-1231 ◽  
Author(s):  
Cheng Da Gao ◽  
Hong Li Wang ◽  
Shun Li Wang ◽  
Ke Feng Liu
Keyword(s):  
Rapid Development ◽  
Organic Fertilizer ◽  
Ecological Environment ◽  
Control Software ◽  
High Quality ◽  
Key Technologies ◽  
Ecological Treatment ◽  
Livestock Feeding ◽  
And Control ◽  
Microbial Agents

A rapid development of intensive livestock and poultry, results in a large number of Aquaculture wastes, it is increasing important that timely consumptive farming wastes, and reduces environmental pollution on protection ecological environment and improving recycling agriculture. In this study, cattle, pigs, sheep, chickens and ducks five categories manure were as material, and it carried out that microbial agents used in compost, equipment, process and control software, and especially passivation of heavy metal residues in manure, degradation technology of estrogen and antibiotics of pollutants. As final, two kind products such as a high—quality organic fertilizer and gardening products, were produced with a better benefits on economic, ecological and social.

A Region of Coal Mine Geological Environmental Survey Assessment and Prevention Countermeasures

2013 ◽  
Vol 726-731 ◽  
pp. 1078-1084
Author(s):  
Jin Xiao
Keyword(s):  
Prevention And Control ◽  
Mining Area ◽  
Control Measures ◽  
Ecological Environment ◽  
Coal Resources ◽  
Exploitation And Utilization ◽  
Geologic Hazards ◽  
Prevention And Control Measures ◽  
And Control ◽  
Geologic Environment

Exploitation and utilization of coal resources will cause disturbances to the geologic environment and damages to the geologic environment conditions of the mining area, and lead to damages to ecological environment, formation of geologic hazards of mines and environmental pollution in the mining area. In this paper, current geologic environment of mines is investigated, and geologic environment problems of mines are assessed and prevention and control measures are researched on a basis of classified areas, with Dazhou, which is an important city in East Sichuan and where coal resources are rich and exploited frequently, as an example, to provide reference for protection, treatment and recovery of geologic environment of coal mines in East Sichuan.

scholarly journals DEVELOPMENT OF WATER QUALITY PARAMETER RETRIEVAL ALGORITHMS FOR ESTIMATING TOTAL SUSPENDED SOLIDS AND CHLOROPHYLL-A CONCENTRATION USING LANDSAT-8 IMAGERY AT POTERAN ISLAND WATER

2015 ◽  
Vol II-2/W2 ◽  
pp. 55-62 ◽  
Author(s):  
N. Laili ◽  
F. Arafah ◽  
L. M. Jaelani ◽  
L. Subehi ◽  
A. Pamungkas ◽  
...  
Keyword(s):  
Water Quality ◽  
Accurate Method ◽  
Water Area ◽  
Quality Parameters ◽  
Water Quality Parameter ◽  
Retrieval Algorithm ◽  
Acquisition Time ◽  
Landsat 8 ◽  
Landsat Images ◽  
Chl A

The Landsat-8 satellite imagery is now highly developed compares to the former of Landsat projects. Both land and water area are possibly mapped using this satellite sensor. Considerable approaches have been made to obtain a more accurate method for extracting the information of water area from the images. It is difficult to generate an accurate water quality information from Landsat images by using some existing algorithm provided by researchers. Even though, those algorithms have been validated in some water area, but the dynamic changes and the specific characteristics of each area make it necessary to get them evaluated and validated over another water area. This paper aims to make a new algorithm by correlating the measured and estimated TSS and Chla concentration. We collected in-situ remote sensing reflectance, TSS and Chl-a concentration in 9 stations surrounding the Poteran islands as well as Landsat 8 data on the same acquisition time of April 22, 2015. The regression model for estimating TSS produced high accuracy with determination coefficient (<i>R</i><sup>2</sup>), NMAE and RMSE of 0.709; 9.67 % and 1.705 g/m<sup>3</sup> respectively. Whereas, Chla retrieval algorithm produced <i>R</i><sup>2</sup> of 0.579; NMAE of 10.40% and RMSE of 51.946 mg/m<sup>3</sup>. By implementing these algorithms to Landsat 8 image, the estimated water quality parameters over Poteran island water ranged from 9.480 to 15.801 g/m<sup>3</sup> and 238.546 to 346.627 mg/m<sup>3</sup> for TSS and Chl-a respectively.

scholarly journals The Influence of Removal of Specific Wavelengths of Light on the Height of Chrysanthemum Plants

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 834F-835
Author(s):  
Venkat K. Reddy ◽  
Nihal C. Rajapakse
Keyword(s):  
Plant Height ◽  
Dry Weight ◽  
Water Control ◽  
Chl A ◽  
Height Control ◽  
Leaf Chlorophyll ◽  
Control Film ◽  
Developmental Physiology ◽  
And Control ◽  
Leaf Dry Weight

The influence of removal of specific wavelengths [red (R), blue (B), and farred (FR)] from sunlight on the height of chrysanthemum plants was investigated by overlaying Roscolux™ colored acetate films on 4% CuSO4 or water (control) spectral filters. CuSO4 filters removed FR wavelengths and significantly reduced plant height and internode length compared to control plants that received B, R, and FR wavelengths of light. Plants grown under Roscolux blue filters did not receive R light and were significantly taller compared to plants from any other treatments. Plants grown under Roscolux red filters did not receive B light and were significantly shorter compared to plants from other treatments. Leaf area, leaf dry weight, and stem dry weight were highest in plants grown under Roscolux red and control filter combination. The amount of leaf chlorophyll and the ratio of Chl A: Chl B was highest in plants grown under Roscolux blue filters. In general, plants that received FR light (control + film) were taller than the plants that did not receive FR light in the corresponding (CuSO4 + film) filter combination. The influence of removal of specific wavelengths on plant height control and developmental physiology will be discussed.

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