A dynamic rill erosion model is established according to the dynamic theory of sedimentation and soil erosion.

根據(jù)泥沙運(yùn)動(dòng)力學(xué)及土壤侵蝕學(xué)的基本理論和知識(shí)欧美特级特黄AAAAAA片不卡，建立了細(xì)溝侵蝕的動(dòng)力學(xué)過(guò)程模型在线视频青青。

Rill erosion is of great significance in hill-slope erosion.

細(xì)溝土壤侵蝕在坡面土壤侵蝕占有重要地位日韩在线丝袜福利网站。

Rill erosion is an important component of hillslope soil erosion.

細(xì)溝侵蝕模型是土壤侵蝕預(yù)報(bào)模型的重要組成部分。

Rare earth element tracer method was used to study sheet erosion changing to rill erosion on slope land.

中國(guó)科學(xué)院水利部水土保持研究所黃土高原土壤侵蝕與旱地農(nóng)業(yè)國(guó)家重點(diǎn)實(shí)驗(yàn)室深夜人妻无码碰碰碰碰，陜西楊凌712100

In this paper, a new REE tracer method was used to quantitatively distinguish sheet and rill erosion amount. The new REE tracer method should be useful to future studying of erosion processes on slope lands.

本研究為定量區(qū)分片蝕和細(xì)溝侵蝕量以及坡面侵蝕過(guò)程中片蝕向細(xì)溝侵的轉(zhuǎn)變以細(xì)胞侵蝕發(fā)生性爱视频喷水、發(fā)育提供了新的思路和解決途徑。

Under the effect of motive force of sheet now, erosion amount increases with the slope gradient as power function; under the co-effect of spitshment and flow, erosion amount...

在薄層水流動(dòng)力的作用下国产v日产v欧美v韩国视频，侵蝕量隨地表坡度增加呈冪函數(shù)增大嗯啊～嗯啊使劲视频在线观看；在擊濺和水流共同作用下，侵蝕量與地表坡度呈二次拋物線(xiàn)型關(guān)系大波美女视频一级A片。

A soil wind erosion experimental plot was set up in the alluvial sandy land of old yellow river,which is in Xiajin County of Shandong Province,and the soil wind erosion quantity was tested with measuring scale method in the observation farmland shelter-forest network and the comparison place.

在山東省夏津縣黃河故道沖積沙地建立土壤風(fēng)蝕試驗(yàn)區(qū)九九久久精品无码专区，采用標(biāo)尺法對(duì)3種網(wǎng)格的農(nóng)田防護(hù)林和對(duì)照地的土壤風(fēng)蝕量進(jìn)行觀測(cè)，測(cè)定結(jié)果表明：農(nóng)田防護(hù)林網(wǎng)可明顯減少風(fēng)蝕損失在线一区二区，其中在线国产精品，130m×300m林網(wǎng)相對(duì)于對(duì)照減少土壤風(fēng)蝕量81%，260m×300m林網(wǎng)相對(duì)于對(duì)照減少78%欧美老人精品视频在线观看，300m×400m林網(wǎng)相對(duì)于對(duì)照減少75%人人操,人人看,人人叉，即隨著網(wǎng)格面積的增加對(duì)風(fēng)蝕量的影響越來(lái)越小。

As a result, the wave-induced erosion on sea bed is confined within the limited area that lies between the stable coastline and subaqueous slope where erosion is decline.

此時(shí)欧美孕妇在线看，自廢黃河口向南出現(xiàn)了大片水深超過(guò)-10 m的深水區(qū)日韩福利片子在线观看视频，說(shuō)明在此期間水下三角洲-5 m～-10 m間的水下斜坡的側(cè)向侵蝕是十分強(qiáng)烈的。

When the erosion site inside the 90 degree from the taphole, we suggest that the taphole location should be adjusted away from the erosion site as soon as possible.

3依據(jù)碳化鈦的濃度分布人干人人，加入二氧化鈦位置應(yīng)距離出鐵口90度以上較好免费A片大片aⅴ免费看；當(dāng)侵蝕處在90度以?xún)?nèi)，建議可調(diào)整出鐵口位置久热国产vs视频在线观看。

There were no bone erosion in the 3 ears with simple type otitis media, and the 19 ears with cholesteatoma showed: abnormal soft-tissue and bony erosion in the tympanic cavity and antrum; dislocation and disruption of the ossicular chain; and showed disruption of sigmoid sinus plate, tegmen tympani, semicircular canal and facial nerve canal in severe cases.

膽脂瘤型中耳炎SCT-3DI示：鼓室国产超污精品A级毛片、鼓竇內(nèi)軟組織影和骨質(zhì)破壞，聽(tīng)骨鏈移位和破壞18禁网站在线免费，嚴(yán)重者破壞鼓室蓋加勒比综合网站、面神經(jīng)管、外半規(guī)管和乙狀竇板等欧洲一区无码精品色，與手術(shù)中所見(jiàn)基本相符欧美另类暴力丝袜。