最新消息:

[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)(4)

一线实稿 樊明璨 来源:樊明璨博客 625浏览 0评论

gef-1

四、水文
IV. Hydrology

四川境内水系发达,有大小河流1200余条,属于长江水系面积占96.5%,属于黄河水系面积占3.5%。江河的源头或上游段大都穿行于高山峡谷区,中游流经盆周山地,中、下游曲流于盆地丘陵地带,最后汇入长江,属长江上游水系;只有白河、黑河汇入黄河。四川水能资源蕴藏量达1.5亿kw,仅次于西藏,可开发量近1亿kw,位居全国首位。
Sichuan has very developed water systems. There are more than 1200 rivers, big or small. The area belonging to the Yangtze River system is 96.5%, while that belonging to the Yellow River system is 3.5%. The heads or upstreams of the rivers mostly run through the mountains and gorges; the midstreams flow through the peri-basin mountains; some midstreams and downstreams wind through the intra-basin hilly regions and eventually into the Yangtze River, belonging to the upstream system of the Yangtze River; the only rivers going into the Yellow River are the White River and the Black River. Sichuan has a potential hydropower resource of 150 million kw, only second to Tibet; its exploitation amount almost reaches 100 million kw, ranking 1st in China.

1、四川省岩溶地区属长江水系,河流众多,水量丰富,具有夏涨冬枯、暴涨暴落的特点。地表下垫面透水性强,地下水文过程活动强烈,地下水位埋深一般大于100m,森林植被一旦遭到破坏,导致调水蓄水能力减弱,水资源利用率低,极易造成旱涝灾害。
1. The karst regions in Sichuan are a part of the Yangtze River system, accommodating many rivers and therefore having abundant amount of water characterized by high water in summer and low water in winter as well as sudden high water and sudden low water. The underlaying surface has a good permeability; the underground hydrological activities are fierce; the groundwater level depth is usually greater than 100m; if the forests and vegetation are damaged, the water diversion and storage capacity may weaken and the utilization ratio of water resources may fall, easily leading to drought or flood.

2、川西北区域河流纵横,径流总量982亿m3,属长江水系的有雅砻江、金沙江、鲜水河、大渡河、岷江等,属黄河水系的有发源于若尔盖湿地的黑河、白河及其支流。川西北高原高原面地面平坦,水流不畅,容易形成大面积沼泽湿地,面积约116万hm2。高原沼泽湿地是川西北水系的重要特征之一,它不仅具有重要的生态功能,而且为水生动植物特别是水禽提供了良好的栖息场所。
2. Northwestern Sichuan has many rivers crossed each other with a runoff volume of 98.2 billion m3. The rivers belonging to the Yangtze River system include the Yalong River, Jinsha River, Xianshui River, Dadu River, Min River, etc.; those belonging to the Yellow River system include the White River, Black River and their tributaries, both originating from the Zoigê wetland. The plateau in northwestern Sichuan has a plateau surface with flat ground and blocked water flow, which may easily lead to formation of swamp and wetland of a large area amounting to 1.16 million hm2. The plateau swamp and wetland is one of the important features of the water system of northwestern Sichuan, not only having important ecological functions, but also providing a good habitat for aquatic lives, especially aquatic birds.

转载请注明:樊明璨博客 » [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)(4)