Numerous airports have been constructed based on the Twelfth Five-Year Plan for Civil Aviation Development of China. We collected relevant data on the number and distribution of civil airports, the construction of whi...
详细信息
Numerous airports have been constructed based on the Twelfth Five-Year Plan for Civil Aviation Development of China. We collected relevant data on the number and distribution of civil airports, the construction of which had started or that had been assessed and approved. Based on a comparative analysis of the limits of ecological restoration in different ecologically vulnerable areas from the perspective of space, as well as an examination of ecological sensitivity factors in the ecosystems surrounding airport construction projects, suggestions concerning key ecological control techniques to be employed in airport construction projects in different ecologically vulnerable areas are put forward. The results showed that the airport construction projects recently approved by the Ministry of Water Resources and the Environmental Protection Agency are mainly distributed in the ecologically vulnerable areas of the Red Soil Hilly Area in southern China, the Karst Rocky Desertification Area in southwest China, the Agro-pastoral Ecotone in the southwestern mountain region, and the Desert-Oasis Connecting Belt in northwest China. The airport construction projects in the southwest mountain area, the hilly areas of southern China, and in the Qinghai-Tibetan Plateau are mainly based on the ecological technologies of slope protection, interception and drainage management, and vegetation restoration, respectively. In the arid and semi-arid areas, the ecological control technology employed in airport construction is mainly the rational utilization of water resources and reduction or mitigation of the effects of sandstorms. This study aims to serve as basis for soil and water conservation plans in airport construction projects and accelerate ecosystem restoration within the vicinity of airport construction sites.
采用热扩散flow-32包裹式茎流计,于2014年6—9月对柴达木盆地的沙棘茎流速率进行连续观测,并应用Vantage Pro 2小型气象站对林地的太阳辐射、大气温度、相对湿度主要气象因子进行同步采集,对不同天气条件下沙棘茎流速率的变化规律以及...
详细信息
采用热扩散flow-32包裹式茎流计,于2014年6—9月对柴达木盆地的沙棘茎流速率进行连续观测,并应用Vantage Pro 2小型气象站对林地的太阳辐射、大气温度、相对湿度主要气象因子进行同步采集,对不同天气条件下沙棘茎流速率的变化规律以及茎流速率与主要气象因子的相关关系进行研究。结果表明:典型晴天下沙棘茎流日变化呈双峰型,典型阴天下沙棘茎流呈单峰型,晴天的平均茎流速率是阴天的2.87倍;生长季各月的平均茎流速率为:8月>7月>9月>6月;6—9月沙棘茎流速率与温度、太阳辐射呈极显著正相关(P<0.01),与湿度呈极显著负相关(P<0.01),各气象因子相关系数绝对值为:太阳辐射(0.811)>大气温度(0.594)>湿度(-0.571),太阳辐射是主导环境要素;用SPSS软件针对上述3种环境因子进行多元线性逐步回归,得回归模型Fs=19.268-0.221Ta-0.055RH+0.036Rs(R2=0.82),能够对柴达木盆地的沙棘蒸腾耗水量进行预测。
暂无评论