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[地质][环境相关][中英对照]GEF项目四川本底情况(送中央项目办)(7)

一线实稿 樊明璨 来源:樊明璨博客 613浏览 0评论

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2、四川沙区植被由两大部分组成,一是川西北高原区植被,二是川西北峡谷区植被。川西北高原区因地势、积水、热能、海拔等各不相同,形成了寒带高原沼泽、灌丛和草甸植被,其垂直分布不明显,植被类型以多年生小灌丛和草本植物组成的亚高山灌丛或草甸、高山灌丛或草甸、草甸草原等为主。川西北峡谷区因受水分、热量变化的影响,随海拔的升高,形成了寒温带森林、灌丛和草甸植被,以针叶林为绝对优势,阔叶林占比重较小,云杉约占有林地总面积的55%左右。主要建群种有4科20种,其中松科9种;柏科4种;桦木科3种。在灌丛中还混生有川贝、虫草、大黄等名贵野生药材。

2. The vegetation in the desertified region within Sichuan is divided into two portions: vegetation in the northwestern Sichuan plateau region and vegetation in the northwestern Sichuan gorge region. In the first region, due to its diverse relieves, accumulated water, heat energy and altitudes, the frigid plateau mire-shrub-meadow vegetation comes into being, having a vague vertical distribution feature, mainly comprising subalpine scrub or meadow, alpine scrub or meadow and meadow grassland consisting of perennial small scrub and herbs. In the second region, due to the impact of moisture and heat variance as well as rising altitude, the cold temperate forest-scrub-meadow vegetation comes into being, which is absolutely dominated by coniferous forest. The broadleaf forest takes up a small ratio; the dragon spruce takes up 55% of the total forestland area. The main constructive species include 20 species within 4 families, among which there are 9 Pinaceae, 4 Cupressaceae and 3 Betulaceae. Some rare wild medical herbs such as tendril-leaved fritillary bulb, worm grass and Chinese rhubarb grow in the scrub as well.

第二节 社会经济状况

Section 2 Society and Economy

一、行政区划、人口、民族

I. Administrative division, population and ethnic groups

四川省划分为1个副省级市、17个地级市、3个少数民族自治州。下辖市辖区43个、县级市14个、县120个、自治县4个。2010年末常住人口8185万人,占全国6.1%,居全国各省(市、区)第3位。人口密度168.8人/km2,高于全国平均。主要集中于盆地内岷江、沱江、嘉陵江和长江流域,以青川—北川—都江堰—天全—马边—屏山为界的东部,面积占四川省三分之一,人口占四川省90%以上,人口密度470人/ km2以上。西部人口密度很低。四川省有55个民族,少数民族人口超过400万人,占总人口5%左右。彝、藏、羌、苗、回、蒙古、土家、傈僳、满、纳西、布依、白、壮、傣等14个少数民族世居省内,是全国第二大藏族聚居区、最大的彝族聚居区和唯一的羌族聚居区。

Sichuan province is divided into 1 vice-province-class city, 17 prefecture-level cities and 3 ethnic autonomous prefectures, including 43 inferior city-governed districts, 14 county-level cities, 120 counties and 4 autonomous counties. By the end of 2010, Sichuan has 81.85 million permanent residents, taking up 6.1% of the national total population, ranking third in China. The population density hits 168.8 persons/km2, higher than the national average. The population is mainly concentrated in the intra-basin Min River, Tuo River, Jialing River and the Yangtze River basin, namely the east of the boundary comprising Qingchuan, Beichuan, Dujiang Weir, Tianquan, Mabian and Pingshan, taking up 1/3 of the total provincial area, accommodating more than 90% of the total provincial population, the population density exceeding 470 persons/ km2. The western part is low in population density. In Sichuan, there are 55 ethnic groups; the population of the minority groups exceeds 4 million, taking up 5% or so of the total population. Sichuan accommodates 14 permanent minority groups: Yi, Tibet, Qiang, Miao, Hui, Mongol, Tujia, Lisu, Manchu, Nakhi, Bouyei, Bai, Zhuang and Dai, being the second largest Tibetan-inhabited region, the largest Yi-inhabited region and sole Qiang-inhabited region in China.

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