Plain widespread sand dunes, sand dunes relative height of 15-20 meters, up to 50 meters.

平原上沙丘廣布国产乱人视频在线观看ktv，沙丘相對高度15—20米，最高可達(dá)50米啪啪啪啪网址。

Microbiotic crusts had a high capacity of evaporation than the shifting sand dunes. During the evaporation process of one week after rainfall, the total evaporation in artificial vegetation regions constructed in 1956, 1964, and 1981 were 6.05, 4.99 and 4.23 times respectively as the total evaporation in shifting sand dunes.

微生物結(jié)皮有著比流沙區(qū)更高的蒸發(fā)能力久久无码免费的A毛片大全，在雨后一周的蒸發(fā)過程中，1956欧美AA级三级片、1964和1981年人工植被區(qū)的總蒸發(fā)量分別是流沙區(qū)總蒸發(fā)量的6.05在线观看所有免费AV网站、4.99和4.23倍。

The analyses of social and economic development indicate that, up to 1998, the total population in Yijinholo County is 143, 949 persons, the population density is 24 persons per square kilometer, large population number results in land exploitation for food and overgrazing in rangeland. The change in temporal and spatial pattern of landuse from 1977 to 1998 demonstrates that mobile sand dunes was replaced by rangeland and woodland and partial shrubland in the middle of study area changed into rangeland and farmland from 1977 to 1987, while mobile sand dunes and rangeland transformed into shrubland and farmland in a small parts from 1987 to 1998, the above-mentioned change is proved by the change of fractal dimension index and fragmentation index at landscape and its element levels.

對近50年來伊旗社會經(jīng)濟(jì)發(fā)展的分析結(jié)果表明国产精品香蕉在线的人，雖然人口增長率基本上呈下降趨勢，但由于人口基數(shù)較大一区二区不卡免费在线，截至1998年底色久综合在线，伊金霍洛旗的人口總數(shù)達(dá)143949人，人口密度為24人／平方公里xfplay资源，較高的人口密度帶來了更多的生存需求女人18毛片九区毛片，使得大量的草牧場被開墾，而剩余的則嚴(yán)重超載美女黄的免费。1977-1998年間伊土地利用結(jié)構(gòu)總體格局變化的分析結(jié)果表明爽爽爽A片男女免费爽视频屁股，1977-1987時段內(nèi)主要是流動沙地為草牧場和喬木林地所取代，伴隨著中部的部分灌木林地轉(zhuǎn)換為草牧場和農(nóng)地：而1987-1998時段內(nèi)主要是草牧場和流沙地為灌木林地和農(nóng)地特別是灌木林地所取代看A一级欧美黄色录像，而景觀及各景觀要素的分維度指數(shù)和破碎度指數(shù)的變化也充分證實(shí)了這一結(jié)論噜噜吧先锋音av资源一百度，雖然在前10年（1977-1987年）中大面積的灌木林被砍伐，但土地利用格局的整體變化間接地反映出該時段內(nèi)荒漠化的狀況正在發(fā)生逆轉(zhuǎn)xx网站在线观看。

sand bypassing：排沙設(shè)施

retreat 再處理 | sand bypassing 排沙設(shè)施 | sand dunes 沙丘

Sand dune fixation：沙丘固定

旱作 Dry farming | 沙丘固定 Sand dune fixation | 沙丘 Sand dunes

Sand dunes：沙丘

從Furnace Creek到沙丘(Sand Dunes)大約30+ miles,讀過爾東和夢緒的游記,出發(fā)前特意準(zhǔn)備了沙巾, 想著山谷中落日來的早,我們3點(diǎn)鐘便來到了Sand Dunes.