查询词典 headwater erosion

Soil erosion on cultivated slope land in Ansai experimtnta l plots northern Shaanxi was deterˉ mined by 137 Cs tracing method.The relationship between soil erosion and soil pro perty on northern Loess Plateau was investigated.

运用 137 Cs示踪了陕北安塞试区坡耕地土壤侵蚀量，并以室内分析的方法研究了黄土高原北部坡耕地土壤侵蚀与土壤性状的关系。

In accordance with the characteristics of soil erosion of small watershed in the loess plateau, the problem on building the soil erosion model system was analyzed.

针对黄土高原小流域土壤侵蚀的特点，对建造土壤侵蚀量模型系统进行了分析。

The principal character of soil erosion in Ninxia is grave soil and water loss in central and southern area, and strong wind erosion in the northern area.

宁夏土壤侵蚀主要特点是中南部水土流失严重，北部风蚀强。引起土壤侵蚀的发生和发展，主要是受自然和人为两方面因素的影响。

Using environmental radionuclide 210Pb to study the soil erosion and sediment had great application value and potential. When the nuclide was settled on the surface with atmosphere, it was absorbed by the soil particle quickly. The soil erosion rate on the scale of 100 years was traced through the remotion of nuclide in soil and its regular distribution nude.

利用环境放射性核素210Pb来研究土壤侵蚀和沉积具有很大的应用价值和潜力，当核素随大气沉降到地表时，迅速被土壤颗粒吸附，通过其在土壤间的移动和有规律的分布模式可以示踪100年尺度上的土壤侵性速率。

The study of erosion is focused on the rill erosion process.

对侵蚀问题的研究集中于细沟侵蚀上。

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

根据泥沙运动力学及土壤侵蚀学的基本理论和知识，建立了细沟侵蚀的动力学过程模型。

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

细沟土壤侵蚀在坡面土壤侵蚀占有重要地位。

Rill erosion is an important component of hillslope soil erosion.

细沟侵蚀模型是土壤侵蚀预报模型的重要组成部分。

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

中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室，陕西杨凌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.

本研究为定量区分片蚀和细沟侵蚀量以及坡面侵蚀过程中片蚀向细沟侵的转变以细胞侵蚀发生、发育提供了新的思路和解决途径。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？