【摘 要】
:
With the approach of the second water storage of the Three Gorges Project, urban migration has become a great concern. However, being influenced by economical,
论文部分内容阅读
With the approach of the second water storage of the Three Gorges Project, urban migration has become a great concern. However, being influenced by economical, social or other factors, ecological problems have apparently become pressing. All these problems are exerting great impact upon the speed and quality of new citys or towns construction. By means of ecology, urban ecology, landscape ecology,human settlement science as well as the principle of sustainable development, this paper analyzes the ecological problems in urban migration, and the corresponding approaches in order to promote ecological environment construction of new cities and give an impetus to sustainable development of the whole human settlements in the Three Gorges Reservoir Region.
其他文献
笔者 1 998~ 1 999年对天牛、黄刺蛾 Cnidocampa flavescens(Walker)危害美洲黑杨、意杨的情况作了调查和分析。结果表明 :美洲黑杨对这两种害虫具有一定抗性
From 1998 to 1
慢性鼻炎是鼻腔粘膜下层的慢性炎症,表现为头疼、鼻塞、鼻痒、打喷嚏、流鼻涕,通常是由鼻腔粘膜与刺激性气味长期接触并受影响,nazila(乃孜来)液体刺激粘膜并经常与灰尘接触,
Objective:To prepare nanophase artificial bone composite scaffold based on bionics theory, and probe into how different content ratio between collagen and inorg
该文通过对南岳景区 6个主要景点的松树枯死林分的调查和 49株被蛀干害虫危害的样木的解剖、取样和分析 ,认为景区内松树枯死的主要原因系华山松松茎象Hylobitelussp.和松墨
日本一家公司制成了一种耐高温的超延性钼材,解决了常用钼材在高温条件下易脆化的问题。这种添加了稀土元素(添加量为10%左右)而制成的钼材,即使加热到2 000 ℃以上,仍具有很高
大众宣布2020年将在华交付40万辆新能源汽车rn11月15日,大众集团在广州举行沟通会.大众在活动现场公布,将于2019年在中国与合作者共同投资超过40亿欧元(折合人民币314.72亿元
赤松毛虫Dendrolimus spectabilis Butler蛹体宽度与其产卵量成正比;回归式:y=-1204+1362x,r=0.95,并编制了赤松毛虫蛹体宽度与产卵量查定表,准确率达97.21%,可供预测预报参
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥