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| Near natural stream control techniques and its assessment system |
| Wen Cun,Gao Yang,Gao Jiarong,Chen Zishan,Liu Ying |
College of Soil and Water Conservation,Beijing Forestry University,Key Lab.of Soil and Water Conservation and Desertification Combating,Ministry of
Education,100083,Beijing,China |
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Abstract Near natural stream control is one of the primary methods to rehabilitate degraded stream ecosystem,it is composed by techniques used in near natural stream control and corresponding stream health assessment system.On the base of analyzing the popular appraisal systems,and to satisfy the non-developed economic condition and complex situations of watersheds in China,the advanced near natural stream control assessment system includes eleven indicators:(1)the plane shape of stream;(2)the profile shape of stream;(3)(water)depth of river;(4)water width of river;(5)the structure of bank slope;(6) current velocity;(7)the(riparian)vegetation width;(8) the touching condition between water and riverbed;(9)coarse woody debris in stream channel;(10)the quality of water;(11)benthonic large invertebral animals.According to different healthy degrees of stream ecosystems,the near natural stream control techniques will be done,and all those(offer)necessary guides to restore the whole stream ecosystems and to scientifically manage water resources in(China.)
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Received: 05 March 2006
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YU Kunxia, BAI Lulu, LI Zhanbin, ZHANG Xiaoming, SUN Qian, FANG Jinli, XIE Gang, LI Peng, JIN Tao. Dynamic evaluation of ecological benefits and weight analysis of indexes for the linear production and construction project: A case study of national highway from Xi'an to Shangluo[J]. SSWC, 2018, 16(4): 115-123. |
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