关键词: 水环境, 网络文本, 敏感性评价, 敏感影响因子, 模糊层次分析法, 福建省

Abstract:

Water environment monitoring data plays a key role in water environmental sensitivity assessment. However, insufficiencies remains due to influences of factors such as terrain, environment and site layout. Therefore, this paper took Fujian Province as the experimental area, and used web text collected from key platforms of Fujian Province from April to June 2017 as the data source. Thirteen evaluation factors were selected from three aspects: web text sensitivity, pollution sensitivity and the protection sensitivity of the water environment. Based on the fuzzy analytic hierarchy process combined with the web text, a water environmental sensitivity evaluation model was constructed, and classification validated the rationality of the evaluation results. Results show: (1) In terms of web text sensitivity, the eastern and central-northern region of the province was higher than the western and central-southern region, and the highly sensitive areas were concentrated in Gulou District, Jin'an District and Minhou County in the lower reaches of the Min River. (2) In terms of pollution sensitivity, the southern part of the province (especially the southwest and southeast) was higher than the northern, and the highly sensitive areas were mainly distributed in the middle and lower reaches of Ting River, the estuary of the Jiulong River, and the lower reaches of Jin River and Long River. (3) In terms of protection sensitivity, the northwest-central-south part of the province was higher than the northeast-southwest, and the highly sensitive areas were mainly located in Jiangle County and Mingxi County in the upper reaches of Min River, and Wuyishan City in Jian River, Xianyou County in Mulan River and Hanjiang District in Qiulu River. (4) The water environmental sensitivity of the whole province decreased by the order of the southeast, southwest, north, central, north, and the east, and the economically developed areas along the eastern coast and estuaries of rivers showed high sensitivity, especially in Min River Estuary and Jin River Estuary. (5) The water environmental sensitivity assessment combined with the web text was more accurate in the investigation of highly water environment sensitive areas with pollution risks. Our findings suggest that the proposed method is more reasonable for water environmental sensitivity assessment, and has practical significance for predicting or troubleshooting highly-sensitive pollution-risk areas, important protected areas, and areas of public concern.

Key words: water environment, web text, sensitivity evaluation, sensitive impact factors, fuzzy analytic hierarchy process, Fujian Province