白石水库水源富营养化评价及供水可靠性分析

本文在对白石水库水源富营养化进行评价的基础上,对水库供水可靠性进行了分析.从现状水质评价结果看,白石水库的水质满足《地表水环境质量标准》(GB 3838-2002)中的Ⅲ类用水水质要求,可以作为集中式生活饮用水水源地和工业用水水源地.经过水量调节计算,可知白石水库供水水质是可靠的.     

汤河水库分期汛限水位方案效益分析

水库汛期的蓄水担负着城市供水、工农业供水、发电等兴利任务。科学合理地优化水库分期汛限水位,是保障水库供水量和防洪安全的有效手段。以汤河水库为研究对象,提出水库分期汛限水位优化方案,并对调整分期汛限水位后水库增容产生的效益进行分析。     

农村改革试验区下的水库移民脱贫致富研究——以温州10个水库移民安置村为例

2012年中央经济会议上，在国家力推发展新型城镇化的背景下，选取比较具有代表性的温州市为研究对象，对该地区部分移民脱贫致富情况进行实地调查研究，发现移民在脱贫致富中存在的问题及困难，文章进而提出相应的脱贫致富的对策与建议，促进移民脱贫致富，为推进社会主义新农村建设和新型城镇化进一步发展提供有益的借鉴。     

密云水库集水区水源涵养林生态价值计算的一种新方法

密云水库为北京市的主要水源,水库周边的水源涵养林对水库的水量和水质有巨大影响。通过新的计算公式V=Pa.Qa-Pb.Qb计算,每年由于水源林耗水带来经济损失为5 230.77万元,而因为PI=∑Ci/Coi,水源林净水作用节约的水处理费为94 302.9万元,两者相减得出其生态价值为89 072.13万元。     

Effects of closing mountain for forest restoration in the watershed of Miyun reservoir,Beijing

The paper provides a systematical analysis of ecological restoration effects of natural secondary forest of closurearea in Chao Guanxi Gou, Miyun County, Beijing. The results indicate that through more than twenty years of hillclosing afforestation since 1983, canopy closure has improved almost by 0.2; forest cover rate has raised from 7.2% to 93.8%; biodiversity, tree biomass and vegetation community have increased to a great extent. Compared with the average canopy closure before hillclosing afforestation in this area, it has improved to over 0.4 in average and increased by 0.1-0.2. The forest coverage degree has reached more than 90%. Consequently, the forest plays more important roles in intercepting precipitation, improving water storage capacity of soil, decreasing the surface runoff, and preventing soil and water loss.     

Photosynthetic physio-response of Taxodium ascendens seedlings to different soil water gradients

Four different kinds of water treatments were applied to study the photosynthetic eco-physiological characteristics of Taxodium ascendens seedlings in the environment of the Three Gorges hydro-fluctuation belt. The four kinds of water treatments were: normal growth water condition (CK), light drought stress (T1), soil water saturation (T2), and soil submersion (T3). The results showed that different water treatments could effectively influence the content of the photosynthetic pigment, leaf gas exchange and apparent resources use efficiency of T. ascendens seedlings. It was also demonstrated that the T. ascendens seedlings could not only tolerate water submersion and wet conditions but also endure a certain degree of drought. To establish a protection forest system in the hydro-fluctuation belt in the Three Gorges Reservoir Area, the species T. ascendens is suitable for planting in conditions of root submersion or water-saturated soil. In case it is planted in drought conditions, this tree species should be watered appropriately in order to keep its normal net photosynthetic rate. Translated from Forest Research, 2006, 19(1): 54–60 [译自: 林业科学研究]     

合肥市董铺水库及临近区域鸟类多样性研究

2012年12月-2013年11月,采用样线调查和样点观察相结合的方法对合肥市董铺水库及其临近区域不同生境的鸟类资源进行了调查。共记录到鸟类14目31科87种,其中国家Ⅱ级保护鸟类1种、安徽省地方重点保护鸟类25种;古北界鸟类45种（占51.7%）,东洋种25种（占28.7%）,广布种17种（占19.5%）;留鸟33种（占37.9%）,夏候鸟19种（占21.8%）,冬候鸟21种（占24.1%）,旅鸟14种（占16.1%）鸟类群落多样性指数最大生境为水库周围灌丛、树林;而指数最小者为大面积水域。     

陕西省王瑶库区人居环境满意度调查与分析

以陕西省王瑶库区为例,构建了乡村人居环境的满意度调查指标体系,包括自然生态环境、农村基础设施、房屋建筑设计、社会服务与社会关系4个准则层,并对其人居环境满意度进行了调查与统计,结果为房屋建筑设计＞农村基础设施＞社会服务与社会关系＞自然生态环境.在此基础上,分析其原因并进行总结.     

三峡库区兴山县引种美国山核桃试验初报

美国山核桃是著名优良干果油料树种。从浙江、云南等省引进性状表现优良的6个美国山核桃品种在长江三峡库区兴山县栽培试验,观测其引种表现,并对树体生长物候期、生长结果习性及丰产性抗性等进行了初步分析,结果表明：在良好的管理条件下产量和质量与原产地基本相同,适宜于三峡库区兴山县栽培。     

三峡库区主要森林类型的林分蓄积生长预测

正利用林分生长收获模型预测林分生长收获量是森林经营和管理的重要手段。早在200年前欧洲学者就编制了林分产量表,根据林分年龄预测林分产量。20世纪70年代随着计算机的普及,科学家们开始研究林分生长和产量预测模型系统,80年代后趋于成熟[1]。林分水平的生长和产量预测模型是采