甘肃省疏勒河流域尾闾生态补水工程措施研究
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摘要
以向疏勒河尾闾——敦煌西湖国家级自然保护区输送生态水量为目的,以恢复和归束疏勒河河道为措施,通过调查疏勒河现有河道、已消失古河道现状,考虑疏勒河下游河道输水水量逐渐衰减的特性,分析确定了河道生态输水效率及输水流量。针对工程中存在的风蚀、风积作用影响河道成型稳定,部分河段地下水埋深浅、土质疏松,工程运行期形成结晶盐塞,壅塞河道,影响输水效率等问题,设计中主要采取了绕线、换填等措施。疏勒河河道恢复与归束工程于2013年陆续开工建设,2016年大部分河段基本建成,2016年(丰水年)在已建成的河段进行了试通水,达到了预期的输水效果。
The purpose of this paper was to transfer ecological water to Shule River tail-Dunhuang Xihu national nature reserve,restore and return the river course as a measure,through the survey of existing channel and status of disappeared paleo channels and considering the characteristics of gradual attenuation of the flow in the lower reaches of the river,the ecological water transfer efficiency and discharge of the channel were analyzed and confirmed. The design mainly to adopt the measures of winding and filling,for the wind erosion and wind deposition affecting the formation and stability of the river course,shallow groundwater level and loose soil in some sections of the river,crystal salt plug formed during the project operation period,blocking the river course and affecting the water transfer efficiency. The Shule River restoration and returning project successively started its construction in 2013 and most of the river sections were basically completed in 2016. In2016( wet year),the water transfer was tested in the completed river sections and the expected water transfer effect was achieved.
The purpose of this paper was to transfer ecological water to Shule River tail-Dunhuang Xihu national nature reserve,restore and return the river course as a measure,through the survey of existing channel and status of disappeared paleo channels and considering the characteristics of gradual attenuation of the flow in the lower reaches of the river,the ecological water transfer efficiency and discharge of the channel were analyzed and confirmed. The design mainly to adopt the measures of winding and filling,for the wind erosion and wind deposition affecting the formation and stability of the river course,shallow groundwater level and loose soil in some sections of the river,crystal salt plug formed during the project operation period,blocking the river course and affecting the water transfer efficiency. The Shule River restoration and returning project successively started its construction in 2013 and most of the river sections were basically completed in 2016. In2016( wet year),the water transfer was tested in the completed river sections and the expected water transfer effect was achieved.
引文
[1]张一驰,于静洁,乔茂云,等.黑河流域生态输水对下游植被变化影响研究[J].水利学报,2011,42(7):757-765.
[2]孙志强,孙志刚,邓小东.额济纳绿洲的生态退化过程与生态保育对策分析[J].干旱区资源与环境,2011,25(9):39-45.
[2]孙志强,孙志刚,邓小东.额济纳绿洲的生态退化过程与生态保育对策分析[J].干旱区资源与环境,2011,25(9):39-45.