描述:
made for economic prosperity. At the same time, some
man-made natural disasters have been paid more and more attentions , so the research on hydraulic
characteristics of the river in recent years has been put on the agenda. Considering the ecological
environment, flood control, pollution prevention and control method, and in view of the perspective of
the urban landscape as well as the national strategic plan for sustainable development, the research the
hydraulic characteristics of river and making river reasonably repair and ecological reconstruction will
become a general trend, because that is a kind of remediation measure for human to be done
unreasonable exploitation, and it also will be the strong protection of river resources and sustainable
model for better using river resources in the future.
描述:
e
are scarce
are one of the
and nonrenewable
of city devel
engrave epoch stamp, They are often named "Green Antique" and "Live
opment,
Cultural
relic" by having high ecological, social, economic value, scientific research, high
ornamental and tourist, and historical memorial meaning.
描述:
cultivation development process to
be especialty difficult, frequent occurrence of multiple disasters, the development of the
Northwest Territories are important constraints, the reduction of agricultural land, agriculture,
the substantial loss of population, agriculture, infrastructure damage, agricultural ecological
environment and the poor. Based on this, the north-west areas of the process of agricultural
drought introduced varieties, select a variety of agricultural disaster mitigation technology. In
this paper, the Northwest Territories to explore the Ming and Qing Dynasties of natural
disasters on agricultural production hazards, damage the rural economy and livelihood of the
affected farmers. By the six parts.
描述:
f the earth's
surface.Therefore,it has great benefit for clarifying the mutual action between human
beings and land and their change principles in the historical period when the land use
and the land cover changes are chosen as the study perspective.