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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)(2)

一线实稿 樊明璨 来源:樊明璨博客 560浏览 0评论

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1、四川省石漠化土地在川西南山地区呈集中连片分布,以攀(枝花)西(昌)盐源侵蚀宽谷盆地中山区最为严重,石漠化类型最多、面积最大;峨眉山大凉山侵蚀中山区潜在石漠化面积较大;四川盆周山地区呈不连续分散分布。石漠化分布区地层以三叠系、二叠系灰岩、白云质灰岩地层最为严重;石漠化发育区地貌类型主要为中、低山石丘坡地、溶蚀残丘、宽谷盆地为主。
1. The rocky desertified land in Sichuan is patchily concentrated in the mountainous zone of Southwestern Sichuan, especially of the Panzhihua-Xicang Yanyuan erosion strath basin, where the rocky desertification types are most and the area of such land largest; there is also a relatively large potential rocky desertification area in the Mount Emei-Daliang Mountains erosion mountainous zone; such land is discretely scattered in the peri-basin mountainous zone. The strata within the rocky desertification zone are mostly Triassic and Permian limestone and dolomitic limestone strata; in the rocky desertification development zone, the landform is mainly medium and low mountain rocky hill sloping field, solution monadnock and strath basin.

2、四川沙区北部区域为海拔4000m左右的高山环绕的完整山原,与西藏自治区、青海省的毗邻地区属于同一地形地貌类型。地势南高北低,大致以黄河大湾处的唐克为中心成为湖盆洼地,海拔3500m左右;第四系松散堆积物分布普遍,多沼泽、湖泊及洼地。西北部石渠、色达一带,山势平缓,河谷宽坦。中部甘孜、理塘一带,是全省最高高原,海拔多在4000m以上,地势高耸,山顶浑圆,高原面保存较为完整。东部和南部是四川东部盆地向西部高原的过渡地带,地势北高南低,山高谷深,山峦重迭,山顶峭峻,峡谷深邃,多为海拔5000~6000m以上山峰,相对高差多在1000~2000m以上,大渡河至贡嘎山巅高差达6400m。
2. The northern portion of Sichuan desertified zone comprises complete mountains and plains surrounded by high mountains at around an altitude of 4000m, having the same type of landform as the area adjacent to Tibet Autonomous Region and Qinghai. The portion takes on a high-south low-north relief, being a lake-basin hollow roughly centering around Tangke at the Yellow River bight, the altitude reaching 3500m or so; there Quaternary unconsolidated deposits are extensively distributed with many swamps, lakes and hollows. The Serxu-Sêrtar region to the northwest has a gentle mountain relief and broad plain rivers. The central Garzê-Litang region is the highest plateau in the province where the altitude mostly reaches above 4000m with a rising relief, round mountain top and relatively complete plateau surface. The eastern and southern portions are a transitional zone between Eastern Sichuan Basin and Western Plateau, where the relief takes on a high-north low-south feature with high mountains and deep valleys. Most mountains have steep tops and an altitude above 5000~6000m. The relative height difference between such mountains usually exceeds 1000~2000m. The height difference between the Dadu River and the peak of Mount Gongga hits 6400m.

三、气候 III. Climate

四川省气候区域性、过渡性和复杂性特征突出。按照水热和光照条件,分为四川盆地中亚热带湿润气候区、川西南山地亚热带半湿润气候区、川西北高山高原高寒气候区。气候类型多样,垂直差异大,季风气候明显,区域特色鲜明,气候灾害种类多。
The climate in Sichuan province is regional, transitional and complex. By water, heat and sunlight conditions, it can be divided into three climatic zones: mid-basin subtropical humid climate zone, Southwestern Sichuan mountain subtropical sub-humid climate zone and Northwestern Sichuan alpine plateau paramos climate zone. It features various climate types, huge vertical differences, obvious monsoon climate, striking regional characteristics and various climate damages.

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