摘要：
In the paper, Authors separately used analytical hierarchy process, expert scoring method, principal component and BP network to establish the weights of ecological vulnerability evaluation Index system in the Hengyang Basin as a case, and used hierarchical-comprehensive index -clustering model, principal component-comprehensive index-clustering analysis model, expert scoring-composite index-clustering analysis model, BP artificial neural network model to evaluate separately the reality vulnerability in 2000. The results shows that study area are moderate weak, and the results broadly similar. Authors think that Principal component and artificial neural network model can avoid subjective factors, and taking the way of the expert group judgment is to reduce the error of ecological vulnerability assessment. With the impact of global change and the strengthening of fragile ecosystems, China has carried out many researches and practices on vulnerability assessments[1,14]. Although Vulnerability assessment in many ways, not yet formed a unified evaluation method, this paper draw on previous evaluation methods based on [1,11], using AHP, principal component analysis, BP neural network and expert scoring method on quantitative assessment and analysis, then clustering the results by comparison to determine which method to evaluate the most accurate. Authors analysis the Hengyang Basin reality vulnerability in 2000, attempting to explore a more suitable and easy erosion in hilly areas degraded fragile vulnerability assessment method. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Conference ESIAT2011 Organization Committee.
期刊：
Environmental Science and Pollution Research,2021年28(46):66072-66085 ISSN：0944-1344
通讯作者：
Peng, Bo
作者机构：
[Jiang, Chunxia; Peng, Bo; Wu, Sicheng; Li, Xiaomin; Xie, Shurong; Fang, Xiaohong; Dai, Yanan] Hunan Normal Univ, Sch Geog Sci, Changsha 410081, Peoples R China.;[Jiang, Chunxia; Peng, Bo; Wu, Sicheng; Li, Xiaomin; Xie, Shurong; Fang, Xiaohong; Dai, Yanan] Hunan Normal Univ, Key Lab Environm Heavy Met Contaminat & Ecol Reme, Changsha 410081, Peoples R China.;[Fang, Xiaohong] Hengyang Normal Univ, Coll City & Tourism, Hengyang 421002, Peoples R China.;[Xie, Shurong] East China Univ Technol, Sch Earth Sci, Nanchang 330013, Jiangxi, Peoples R China.
通讯机构：
[Peng, Bo] S;School of Geographic Sciences, Hunan Normal University, Changsha, 410081, People's Republic of China.;Key Laboratory of Environmental Heavy-Metal Contamination and Ecological Remediation, Hunan Normal University, Changsha, 410081, People's Republic of China.
关键词：
Cd anomaly;Cd contamination;Dongting Lake;ecological risk;inlet sediments
摘要：
The total concentrations of Cd in bulk sediments and those of the BCR sequential extraction fractions of sediments from inlets of the Four Rivers that feed Dongting Lake were determined using ICP-MS techniques. The results suggested that Cd was heterogeneously distributed in the inlet sediments of the rivers, with the highest degree of enrichment in sediments from the Xiangjiang River. The Cd anomaly was defined as Cd enrichment in sediments with an EF (enrichment factor) > 10.0, and it was identified in the inlet sediments of the Xiangjiang River. Cd in the sediments was dominated by acid-soluble Cd at a proportion of 23.9-69.8 (%) compared to its total concentrations in the sediments. The inlet sediments of the Four Rivers were contaminated with Cd, with the highest degree of contamination in the inlet sediments of the Xiangjiang River. The Cd contamination as well as the Cd anomaly in the sediments were closely related to the industrial activities (e.g. smelting and refining for ore minerals) in the areas, and Cd contamination at high levels may represent an ecological risk for the lake watershed. Cd contamination of the inlet sediments may also impact the lake basin sediments and is harmful to the lake ecological system, particularly for sediments of the Xiangjiang River. Therefore, it is essential to control and treat Cd contamination in the inlet sediments for ecological environmental protection of lake watersheds.
摘要：
The inhibited or enhanced uptake of heavy metals by iron plaque has been observed. The relationship between amounts of adsorption and accumulation of heavy metals and iron plaque on roots of wetland plant is still unclear. This study examined the effects of iron plaque on lead (Pb) absorption and translocation between underground and above-ground parts of a wetland plant species. Broad-leaf cattail (Typha latifolia L.) was grown in soil for four weeks under waterlogged conditions in a greenhouse. The soils were treated by Pb as lead nitrate at four levels (0, 100, 500 and 1000 mg Pb·kg-1) and waterlogged for two weeks. The results showed that the amount of iron plaque in the treatment with addition of 500 mg Fe·kg-1 was general higher than that of the treatment with addition of 100 mg Fe·kg-1, Lead concentrations in both shoots and roots treated by 500 mg Fe·kg-1 was more than that of the treatment with 100 mg Fe·kg-1. When the ratio of added Fe and Pb was 1, the accumulation of Pb in plants was higher than that of other treatments at the same Pd level. Appropriate amount of iron supplied will benefit lead accumulation in plant, which help the removal or stabilization of lead in constructed wetland.
期刊：
MATERIALS SCIENCE, ENVIRONMENT PROTECTION AND APPLIED RESEARCH,2014年908:453-456 ISSN：1662-8985
通讯作者：
Wu, Yue
作者机构：
[Wu, Yue] Hengyang Normal Univ, Dept Econ & Management, Hengyang 421008, Hunan, Peoples R China.;[Dong, ZiXiong] Hengyang Normal Univ, Dept resources Environm & Tourism Management, Hengyang 42100, Hunan, Peoples R China.
通讯机构：
[Wu, Yue] H;Hengyang Normal Univ, Dept Econ & Management, Hengyang 421008, Hunan, Peoples R China.
会议名称：
2nd International Conference on Environmental Science and Material Application (ESME)
会议时间：
MAR 22-23, 2014
会议地点：
Wuhan, PEOPLES R CHINA
会议主办单位：
[Wu, Yue] Hengyang Normal Univ, Dept Econ & Management, Hengyang 421008, Hunan, Peoples R China.^[Dong, ZiXiong] Hengyang Normal Univ, Dept resources Environm & Tourism Management, Hengyang 42100, Hunan, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Corporate Social Responsibility;Environment Protection;Indicators
摘要：
In recent years, most area PM2.5 of our country is high, water pollution incidents occur frequently, as the main body of the market economy, enterprises about environment protection and economic symbiosis development can not shirk its responsibility. In the qualitative and quantitative analysis, the combination of theory and practice, systematic, scientific, operational principle, constructing the index system of corporate social responsibility has important practical significance for environment protection.
