北京自然条件的综合评价

A COMPREHENSIVE VALUATION ON NATURAL CONDITIONS OF BEIJING MUNICIPALITY

一、怎样对自然条件进行综合评价(一)自然条件和自然资源自然条件包括气候、水文、地质地貌(包括地震)、土壤、生物等,与一定地域相联系的这些自然条件的整体叫景观。景观的局部地段叫土地。人类经常对区域的自然条件进行作用,要开发利用、改造和保护它,使天然面貌发生改变,天然面貌改变后,景观的发展仍然遵循自然规律。人类活动是决定一个地区自然面貌原因之一。

Having set forth how to evaluate comprehensive natural conditions, authors give a broad discussion on principle aspects of Beijing's natural environment:climate and hydrothermal regime,geologic and geomorphologic elements,soil and plant cover,water and mineral resources,as well as tourist potentiality. In terms of hydrothermal regime and hydrologic structure of relief,first of all,the natural regionalization of Beijing's agriculture is delimited into 3 grade-1 regions.And then a total of 23 grade-2 regions is redivided with description of geographic conditions and relevand valuation in the light of development and utilization.