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| 1 | 重庆开县汉丰湖湿地生态恢复的潜力显示文摘2008年,重庆开县因为三峡水库蓄水形成了汉丰湖。这个人工湖泊由一个调节坝将其与三峡水库划分开。汉丰湖消落带需要特别关注,因为这个湖位于开县新县城旁,并且临近澎溪河湿地自然保护区。本文主要讨论了汉丰湖消落带的管理设想,特别关注生态设计原则和人工湿地。考虑到湖泊的自然独特性,消落带的管理需要开展探索性实验。考虑到邻近以观鸟为主要目的之一的保护区,消落带的管理必须基于生态系统设计。考虑到邻近开县新城,基于社区的管理也是很有必要的。流域面上和湖岸两个尺度的生态系统环境问题需要被纳入管理内容。就消落带自身而言,可以认为生态设计应该以实现湖岸稳定、改善水质、湿地生产、保护多样性、科学教育、食物提供和农产品生产的生态目标为主。可以通过基于社区和生态系统的方法提供对湿地价值的认识程度。消落带湿地生态系统的服务价值会被广泛传播并且会促进开县的经济社会发展。 | Martin J.H.WILLISON 李波 王强 袁兴中 | 2012 | 重庆师范大学学报(自然科学版)2012,29,3: | 5 |
| 2 | 鄱阳湖流域NDVI时空变化及其与地表径流的关系显示文摘根据鄱阳湖流域4个子流域1982-1999年归一化植被指数(NDVI)数据集和4个水文站的径流数据,采用年代际差异变化、相关分析、Morlet小波分析方法,对鄱阳湖4个子流域NDVI和径流关系进行研究,并从年内、年际两个角度研究各子流域的NDVI时空变化特征。结果表明:分析期内鄱阳湖流域各子流域多年平均NDVI的年内变化趋势一致,年平均NDVI总体上都呈增加趋势,NDVI主要受到降水、径流的影响。相关分析显示,整个流域年NDVI与径流量间呈显著正相关,径流量与滞后3个月的植被NDVI间相关性最高;子流域的径流量普遍存在着12个月、部分存在35、62个月左右周期的震荡信号,各信号频率分布的时间域及其强度存在着差异,其中12个月周期最强,短周期强于长周期;NDVI与径流量具有同等的周期变化特点。 | 邵步粉 周锁铨 顾婷婷 李强 | 2010 | 中国农业气象2010,31,2: | 5 |
| 3 | 中国区域地表和大气人为影响敏感区域分布显示文摘通过1981-2000年NOAA-AVHRR 8km*8km卫星数据,从季节和年尺度分析了人为活动对地表植被覆盖具有显著影响区域分布。在季节尺度上,人为的多季农业耕作活动,造成部分地区植被覆盖出现季节不连续性,在植被轮作季节地表物理属性和几何特征发生明显变化;在年尺度上,人类活动对区域气候的影响主要体现在造成区域地表和大气热力作用改变,热力作用增强的结果反映在区域内低云覆盖发生变化,低云出现减少趋势。相反在植被覆盖增加或人为绿化区域,地表热力作用下降,低云出现增加。 | 徐兴奎 | 2011 | 环境科学与技术2011,34,8: | 1 |
| 4 | Human wetland dependency and socio-economic evaluation of wetland functions through participatory approach in rural India显示文摘Wetlands are an important source of natural resources upon which rural economies depend.They have increasingly been valuable for their goods and services,and the intrinsic ecological value they provide to local populations,as well as people living outside the periphery of the wetlands.Stakeholders' participation is essential to the protection and preservation of wetlands because it plays a very important role economically as well as ecologically in the wetland system.The objective of this study was to determine whether gender,educational status,mouzas (which are constituents of a block according to the land reform of the West Bengal Government in India),and wetland functions have any influence on the annual income of the local community.Considering a floodplain wetland in rural India,the focus was extended to recognize the pattern of wetland functions according to the nature of people's involvement through cluster analysis of the male and female populations.Using the statistical software R-2.8.1,an ANOVA (analysis of variance) table was constructed.Since the p value (significance level) was lower than 0.05 for each case,it can be concluded that gender,educational status,mouzas,and wetland functions have a significant influence on annual income.However,S-PLUS-2000 was applied to obtain a complete scenario of the pattern of wetland functions,in terms of involvement of males and females,through cluster analysis.The main conclusion is that gender,educational status,mouzas,and wetland functions have significant impacts on annual income,while the pattern of occupation of the local community based on wetland functions is completely different for the male and female populations. | Malabika BISWAS Nihar R.SAMAL Pankaj K.ROY Asis MAZUMDAR | 2010 | Water Science and Engineering2010,3,4: | 0 |