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At first,ecological mat can effectively reduce soil temperature of the soil layer from 0 cm to 15 cm,in detailed,the average daily soil temperature can decrease 2.06℃ to 4.56℃,which is benefit to reduce soil evaporation in high temperature;During the rainless period,the soil moisture content covered by ecological mat is much higher than mobile sand,especially,the soil moisture content of the layer form 0 cm to 15 cm always keep ...

首先生态垫能够显著降低沙地0~15 cm的土壤温度,日均温可降低2.06~4.56℃,有利于沙地高温条件下减少土壤蒸发;在连续无降雨的情况下,生态垫下各层次的土壤含水量都高于流动沙丘裸地,尤其是15~30 cm含水量相对稳定,人工植被建立后,其保存率、生长量较流动沙地均有较大幅度的提高。

According to the principles of synthesis, dominance, regionality and relative consistency, the environment degradation evaluation system is divided into three classes: vulnerable region, vulnerable type and vulnerable cell. The research area belongs to the erosion degraded Southern Red Hilly Area region. Based on the conceptions and grading, the dissertation probes into the methodology of evaluation and case study, and establishes a potential degradation evaluation system which comprises altitude, gradient, soil erosion index K, annual rainfall, the proportion of rainfall in raining period, and the drought index of rainless period.

在脆弱性概念及其分类的基础上,本文进行了脆弱性评估的方法探讨和实证研究,在脆弱性分析的基础上,选择高度、坡度、土壤可蚀性K值、降雨量、暴雨量、多雨期降雨比重和少雨期干旱指数为潜在脆弱度指标;选取作为区域人地关系、社会经济发展与管理水平综合影响结果的人类活动指标森林覆盖率和坡耕地指数作为现实脆弱度评估的人为加速侵蚀的修正指标,计算生态环境的现实脆弱度,并将其指标体系与方法用于衡阳盆地生态环境脆弱度评估的实证研究。

The key elements of inducing this landslide to be revivable are rainfall ,unreasonable false virescence irrigation and the high and steep topographty in landslides region.

研究成果表明,该滑坡具有显著的分级分块滑动特性,降雨、不合理的人工绿化灌溉及滑坡区高陡的地形是诱发该滑坡复活的主要因素。

An abrupt increase of seasonal inflow occurred at about 10.2 ka BP, as suggested by a layer rich in Ruppia L.

正是由于湖区夏季风降雨增大,湖水位迅速升高到4米以上,沉水植物川蔓藻从此未能在湖中央生长。

It is pointed out bythe monthly dynamic analysis and yearly comparative analysis that the improvementof soil water conservation functions in purple soil sloping fields by planting Pure and mixed stands of Sabaigrass vegetation is synchronous with the local raining rhythmand the longer planted the better the effect.

月季动态分析和年际间比较分析指出,龙须草纯种植被和龙须草-林木复合种植植被对紫色土荒山坡地土壤蓄水性能改良效果既与当地降雨节律同步,又呈现出随着处理年限延长而强化的趋势。

By statistical analysis of the 30 years rainfall of Luoyang,Henan Province,the different patterns of annual precipation were stimulated and the water proof sheld was used to study the effects of different compositions of N,P and water on the yield of winter wheat.

本文通过统计分析洛阳地区近30年的降雨量,模拟洛阳地区不同的降雨年型,利用防雨旱棚研究旱地农田不同N、P、水配合对小麦产量影响。

She says many people are stilling living in temporary shelters which do not provide enough protection from the rains which have begun.

她说很多人仍然居住在临时住所中,它们不能提供足够的关于已经开始的降雨的防护。

Convective, cumuli-stratiform and stratiform of clouds. They have their own precipitation processes with time and space feature on the ground respectively.

结果表明:具有不同结构特征和降雨过程的对流型、积层混合型和层状型三种类型云体,产生了相应时空特征的地面降水过程。

I still remembered that water supply had been cut off in a heavy raining day, I had to fetch water from the river. The earthworms were drowned to death and became w你好te and floated in the river, and swang around my feet. However, I still fetched two barrels of water home.

我还想的起来一次,降雨天家里停水了,我去河滨提水,河滨的蚯蚓早被水淹升天了并被泡患上发白了,浮在水面上,在我的脚旁打转;只管这样,我还是提了两桶水归去。

Influences of rain wash on Hong Hua Da 3m Yuan with the K326 leaf tobacco surface sucrose ester and some chemical components were investigated with natural rain wash and tectorial membrane two treatments.

采用自然雨淋和盖膜处理的方法,研究自然降雨对红花大金元和K326烟叶表面蔗糖酯及其它化学成分总含量的影响。

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