1) dry valley
干旱河谷
1.
Ecological problems of primary dry valleys is Southwest China and advances in the researches into them;
我国西南主要干旱河谷生态及其研究进展
2.
Differences in growth and reproductive characters of Rosa hugonis in the dry valley of the Upper Minjiang River,Sichuan;
岷江干旱河谷黄蔷薇(Rosa hugonis)生长与繁殖特征及其空间差异
3.
Species diversity and floristic characteristics of woody plants in the dry valley of the Bailong River,China;
白龙江干旱河谷木本植物多样性及其区系地理特征
2) Arid valley
干旱河谷
1.
Determination of species-area relationships and minimum sampling area for the shrub communities in arid valley in the upper reach of the Minjiang River;
岷江上游干旱河谷灌丛群落种-面积曲线的拟合及最小面积确定
2.
Analysis on the environmental and spatial factors for plant community distribution in the arid valley in the upper reach of Minjiang River;
岷江上游干旱河谷植物群落分布的环境与空间因素分析
3.
Characteristics of main herb populations in the arid valley of the Minjiang River;
岷江干旱河谷主要草本种群生态位研究
3) Dry river valley
干旱河谷
1.
Analysis on the climatic adaptability of grape in the Dry River Valleyof the Upper Reaches of Minjiang River;
岷江上游干旱河谷葡萄的气候生态适宜性分析
2.
With abundant sunlight and heat, there ai resourceful advantages to develop characteristic agriculture given priority to grape and other temperat defoliated fruit trees in the dry river valley.
岷江上游是长江上游生态环境建设的重要区域之一,其干旱河谷地区光热资源丰富,具有发展以葡萄等温带落叶果树为主的特色农业的资源优势。
4) drought-semidrought valle
干旱半干旱河谷
6) semi-arid valley
半干旱河谷
1.
The semi-arid valley scrubs in the upper reaches(31°15′ 32°32′N,103°10′ 103°54′E)ofthe Minjiang River distribute discontinuosly along the river banks and Occupy a300 400m widebeIt on the slopes.
岷江上游半干旱河谷灌丛不连续分布于岷江河面以上300-100m处。
补充资料:河谷
河谷 river valley 河水所流经的带状延伸的凹地。河谷内包 括了各种类型的河谷地貌。从河谷横剖面看,可分为谷底和谷坡两部分。谷底包括河床、河漫滩;谷坡是河谷两侧的岸坡,常有河流阶地发育。谷坡与谷底的交界处称谷坡麓,谷坡与原始山坡或地面的交界处,称为谷肩或谷缘。从纵剖面看,上游河谷狭窄多瀑布,中游展宽,发育河漫滩、阶地,下游河床坡度较小,多形成曲流和汊河,河口形成三角洲或三角湾。河谷是在流水侵蚀作用下形成与发展的:水流携带泥沙侵蚀使河谷下切;水流的侧蚀使谷坡剥蚀后退,包括谷坡上的片蚀、沟蚀、块体崩落;溯源侵蚀使河谷向上延伸,加长河谷。3类侵蚀方式经常同时进行,只是不同时间、地段各有所不同。河谷的发育受到气候与构造的影响。一般河谷形态类型有:隘谷、峡谷、宽谷、复式河谷。与岩层产状关系可分为顺向河谷、次成谷、逆向谷、偶向谷。其他还有纵谷、横谷的地质构造分类,幼年谷、壮年谷、老年谷的侵蚀轮回分类,以及古河谷、谷中谷等。
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