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河流地貌多样性内涵、分类及其主要修复内容 被引量:18
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作者 赵银军 丁爱中 《水电能源科学》 北大核心 2014年第3期167-170,共4页
针对河流修复中对河流地貌重视不够及多样性认识不深等问题,解析了河流地貌多样性的内涵及与河流栖息地的统一性,将常见河流地貌类型分为3种河谷地貌、38种河床地貌、15种水流形态以及人工活动形成的地貌类型,并提出基于过程的修复策略... 针对河流修复中对河流地貌重视不够及多样性认识不深等问题,解析了河流地貌多样性的内涵及与河流栖息地的统一性,将常见河流地貌类型分为3种河谷地貌、38种河床地貌、15种水流形态以及人工活动形成的地貌类型,并提出基于过程的修复策略来修复河流地貌。在修复河流地貌时,首先应充分考虑形成河流地貌的水陆域过程,识别泥沙源时空分布,并重点修复深槽—浅滩序列。 展开更多
关键词 河流地貌多样性 河流地貌多样性指数 生境 过程 深槽-浅滩
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河流地貌多样性修复方法 被引量:22
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作者 赵进勇 孙东亚 董哲仁 《水利水电技术》 CSCD 北大核心 2007年第2期78-83,共6页
河流生态修复主要包括河流地貌特征的修复和水文特征的恢复。基于河流连续体、河流四维模型等河流生态修复的基础理论以及生态水工学的相关理念,对河流地貌多样性修复的一些方法和工程措施进行了总结和归纳。
关键词 河流 地貌多样性 修复 方法
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河流地貌多样性修复技术研究 被引量:7
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作者 米艳杰 何春光 +1 位作者 王隽媛 姜海波 《水利水电技术》 CSCD 北大核心 2010年第10期15-17,30,共4页
从流域开发角度出发,利用生态学理念,针对修复河流缓冲区、恢复河流蜿蜒性及连续性、创建深潭浅滩、修建生态护岸等内容,综合分析了国内外的研究现状和进展,为今后受损河流生态系统修复工作的开展提供技术参考。
关键词 河流地貌多样性 生态修复 流域开发
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基于生态丁坝群构建技术的汉江上游典型河段栖息地质量改善研究 被引量:2
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作者 徐伟 赵进勇 +3 位作者 王琦 李庆国 付意成 彭文启 《水利水电技术(中英文)》 北大核心 2021年第12期35-46,共12页
在治河工程中,丁坝是应用最广泛的河道内构筑物之一,不仅在防洪护岸、整治航道等方面发挥着重要作用,还会改变河道内水沙结构、河底地形,造成水生生物栖息地的适宜性变化。以汉江上游典型河段为研究对象,运用水沙耦合的二维浅水模型,模... 在治河工程中,丁坝是应用最广泛的河道内构筑物之一,不仅在防洪护岸、整治航道等方面发挥着重要作用,还会改变河道内水沙结构、河底地形,造成水生生物栖息地的适宜性变化。以汉江上游典型河段为研究对象,运用水沙耦合的二维浅水模型,模拟河道内加入丁坝后,河床冲淤变化、河流水深、流速、河床基质的变化情况,同时,采用香农多样性指数(Shannon′s Diversity Index, SHDI)分析丁坝河床冲淤变化、河流水深、流速,以及河底地貌、河床基质多样性的影响。在该研究区,坝长为60%河宽的时候,丁坝对上游的影响首次大于下游,其影响比例为1.016。基质多样性指数在方案b时最大为1.010 687,流速多样性指数在方案f时最大为1.940 41,水深多样性指数在方案d时最大为1.764 04,地貌多样性指数在方案b时最大为3.364 34,同时提出丁坝最佳的设计参数和布置方案。方案b、c、d、f地貌异质性均大于现状方案,最优方案为:坝长40%河宽以下、组合形式简单的丁坝(群)。 展开更多
关键词 生态丁坝群 栖息地改善 地貌多样性
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Effect of Site Factor on Plant Community Characteristic in Closed Watershed in Loess Hilly and Gully Region 被引量:2
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作者 刘中奇 朱清科 +2 位作者 王晶 邝高明 赵荟 《Agricultural Science & Technology》 CAS 2011年第2期274-278,共5页
[Objective] The aim was to study the effect of site factor on plant community characteristic in closed watershed in loess hilly and gully region.[Method] Based on the investigation of vegetation in the closed watershe... [Objective] The aim was to study the effect of site factor on plant community characteristic in closed watershed in loess hilly and gully region.[Method] Based on the investigation of vegetation in the closed watershed of Wuqi County in Shaanxi Province,the difference of plant community characteristic and species diversity under various site types was researched in our paper.[Result] In the investigation area,xerophytic herb was the main community,with sole species composition and simple community structure.Zonal vegetations were Artemisia sacrorum and Artemisia giraldii community;for plant diversity,the order of diversity index was ridge topgully bottomridge slopegully slope in various landform positions and semi-shady slopeshady slopesemi-sunny slopesunny slope in various slope aspects;with the increase of gradient,the diversity index of sunny slope changed with "S" type,and it reached maximum value at 37°.[Conclusion] Our study could provide theoretical foundation for vegetative restoration in loess hilly and gully region. 展开更多
关键词 Species diversity Vegetative restoration Landform position Slope aspect GRADIENT
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Seasonal Effect of Geomorphological Chronosequence Features on Soil Biota Dynamics 被引量:1
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作者 S.PEN-MOURATOV N.GENZER +2 位作者 N.SHUKUROV J.PLAKHT Y.STEINBERGER 《Pedosphere》 SCIE CAS CSCD 2010年第6期761-770,共10页
Numerous studies have been devoted to the physical-chemical weathering processes leading to the creation of unique soil formations having their own history that induce soil-biotic diversity.However,the extent to which... Numerous studies have been devoted to the physical-chemical weathering processes leading to the creation of unique soil formations having their own history that induce soil-biotic diversity.However,the extent to which unique geomorphic formations influence soil biotic seasonal variation is not clear.Our aim was to define seasonal variations of soil biota in soils of different-aged terraces of the Makhtesh Ramon anticline erosional cirque in southern Israel.The strong effect of Makhtesh Ramon (Ramon crater) erosional fluvial terrace age initiated by climatic changes during the Late Pleistocene- Early Holocene period on seasonal variations in both soil properties and the abundance and composition of soil biota were demonstrated.However,age dependence was not constant and values for observed soil properties and microbial activity were negligible between younger and older terraces for certain seasons,while free-living nematodes along with bacterial-feeding group were strongly dependent on the geomorphic features of the ages throughout the study period. 展开更多
关键词 geomorphic formation Makhtesh Ramon microbial biomass nematode community trophic group
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