To put it briefly, they think water and soil conservation only make soil, stone and dreg fixed, in another word, not allow it take place displacement, it doesn't deeply prevent land from degrade in the land care that make the guidelines of the projects, the measure adopt in water and soil conservation, etc. differ from the basic goal of water and soil conservation greatly.

簡單的說欧美二级，認為水土保持僅僅是把土、石九九线精品视频在线观看视频26、渣固定下來特黄AAAAA级作爱片，即不讓其發(fā)生位移，沒有深入到防止土地退化方面的土地保育国产又黄又粗又长的视频，使得方案的指導思想91看电影亚洲精品、采用的水土保持措施等與水土保持的根本目的相去甚遠。

Although the theory of water and soil loss law and the echniques of integrated soil and water conservation measure of primary geomorphy have become quite mature by scientists' effort over several decades in the world, study to water and soil loss in constructional project is slow to developed country. Among researchers, there are many opinions on the model of water and soil loss caused by constructional project because it is serious shortage of data from observation or test in construction projects.

原生地貌水土流失規(guī)律和綜合治理技術措施經(jīng)過幾十年的研究與探索在线免费观看日本视频，基本形成了較為成熟的理論體系和技術措施體系在线一区免费不卡，但我國對開發(fā)建設項目水土保持的研究起步較晚，對水土流失預測的概念日韩免费999视频、內(nèi)容還存在著不同的理解欧美性爱资源网，特別是目前開發(fā)建設項目水土流失定位觀測和動態(tài)監(jiān)測數(shù)據(jù)十分缺乏，水土流失預測模式中的參數(shù)缺乏實驗值成年日本片黄网站大全免费久草，都是憑經(jīng)驗估計或參照坡面或流域水土流失預報方程中的參數(shù)取值欧美最猛性XXXXX69，由此預測出的水土流失量誤差極大，從而影響到水土保持措施的優(yōu)化配置www.色偷偷.com。

7 Percent of rain water was kept in plant after 7 days. The change of plant water δD indicated the water use efficiency of plant was effected by micrometeorology factors. The rising of soil temperature prevented plant root absorbing soil water, and soil moisture content facilitated plant root absorbing soil water.

大雨（65.3mm）降水后亚洲精品中文字幕区，雨水能夠更快地滲入植物的根系層，對干旱區(qū)植物的補水作用較強欧美与黑人视频，植物能夠及時利用大雨日韩孕妇自拍视频网站大全免费观看，而且雨水在植物體內(nèi)保持的時間較長，7天后植物體內(nèi)保持雨水的41.8-53.7％国产精品无码AV欣赏网。

soil alkalization：土壤鹽堿化

水土流失 water and soil erosion | 土壤鹽堿化 soil alkalization | 農(nóng)藥殘留 pesticide residue

water and steam distillation：水上蒸餾

water and soil conservation ==> 水土保持 | water and steam distillation ==> 水上蒸餾 | water annealing ==> 水韌[退火]處理

the effect of water and soil conservations on flood：水土保持對洪水的影響

樁的擠土效應:the effect of pushing agai... | 水土保持對洪水的影響:the effect of water and soil conservations on flood. | 群樁-土-上部結(jié)構動力相互作用:dynamic effect on interactions of pile-group-layere...