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水源保护与饮用水安全是城市发展的必要条件,划定饮用水源地保护区和规范人们的生产与生活方式是保证饮用水安全的重要举措。基于3S技术,本文对广州市饮用水源地保护区的土地利用结构、空间配置及其与饮用水安全的关系进行探讨。主要结论为:①广州市饮用水源地保护区在一定程度上保证了饮用水安全,但仍存在滞后与跨区协调等问题;②二级保护区和准保护区内土地利用数量结构不一,前者建设用地面积最大,耕地次之,后者正好相反,暗示不同区域采取水质保护措施时,应关注不同的污染源;③景观格局特征显示,各保护区土地利用的特征或者特征某一方面不同,如凝聚度和分维数指数的差异较小,多样性和破碎度则正好相反。结果还表明,已有的保护区内仍有较强烈的人为活动。
Water source protection and drinking water safety are necessary conditions for urban development. Defining drinking water source protection areas and standardizing people’s production and life style are important measures to ensure the safety of drinking water. Based on the 3S technology, this paper discusses the land use structure, spatial distribution and its relationship with drinking water safety in the drinking water source protection area of Guangzhou City. The main conclusions are as follows: (1) Protected areas of drinking water sources in Guangzhou ensure the safety of drinking water to some extent, but there are still problems such as lag and cross-district coordination; (2) The quantity of land use in the second-level and quasi-protected areas is not the same , The former has the largest land area for construction and the second for arable land, the latter being the opposite. It implies that different sources of pollution should be taken into account when adopting water quality protection measures in different regions. ③ The characteristics of landscape pattern show that the characteristics or characteristics of land use in different protected areas are different in some ways , Such as the difference of cohesion and fractal dimension index is small, diversity and fragmentation are the opposite. The results also indicate that there are still strong human activities in existing protected areas.