查询词典 headwater erosion

Based on the analysis of the mutual action between CO2 fluids and sandstone, it is found that the higher content of dawsonite is the main cause for poorer reservoir properties, and the dawsonite is formed later than other authigenic minerals and no erosion occurres after the pores filling, which are the basic factors resulting in poor reservoir properties.

分析CO2流体与砂岩的相互作用发现，片钠铝石含量较高是储层物性变差的直接原因，而片钠铝石生长时间晚于其它自生矿物且在充填孔隙后没有发生溶蚀是储层物性变差的根本原因。

Rash, pustular psoriasis may also have changed. X ray showed that some patients with rheumatoid arthritis joint changes and the same may have a partial decalcification bone, joint cavity narrow, there are varying degrees of joint erosion and soft tissue swelling.

皮疹也可有脓疱型牛皮癣的改变。X线显示，部分病人关节的变化和类风湿型关节炎相同，骨质可有局部的脱钙，关节腔狭窄，有不同程度的关节侵蚀与软组织肿胀。

Here we present the erosion condition of Steam Ejector during the decarbonization process and provide the corresponding restoration methodology.

介绍了脱碳流程中蒸汽喷射器的腐蚀情况及修复措施，并对腐蚀的机理作一探讨。

Water depth data ; computer processing ; erosion ; accumulation ; stercogram ; section ; declivity

水深数据；计算机处理；冲刷；淤积；立体图；剖面图；坡度图

The main cause of soil erosion is deforestation .

水土流失的主要原因是滥伐森林。

First,erosion resulting from excessive deforestation in the upper reaches of the r ...

第一，过度砍伐引起的河流上游的侵蚀，第二，严重的泥沙淤积抬高了主干道的河床。

First,erosion resulting from excessive deforestation in the upper reaches of ....

第一，过度砍伐引起的河流上游的侵蚀，第二，严重的泥沙淤积抬高了主干道的河床。

Soil erosion is one of the main environmental problems in the world ,it is the root cause of land deterioration 、 soil fertility degression、 soil physico -chemical quality bad、 land use capability felling and ecological environment deterioration.

土壤侵蚀是世界上的主要环境问题之一，是造成土地退化、土壤肥力下降、土壤理化性质变劣、土地利用率降低、生态环境恶化的根本原因。

Impacts of sea level rise on coastal erosion in the Changjiang Delta and North Jiangsu coastal plain.

海平面上升对长江三角洲和苏北滨海平原海岸侵蚀的可能影响。

The process of ecological degradation in the vicinity of Shaoguan Pb/Zn smelter may be summed as: heavy metals and acidic deposits from the waste gas from smelter resulted in the vanishment of the sensitive plant species, increasing accumulation of heavy metals in soils and acidification of topsoil worsened the chemical properties and then shallow-rooted plant, mainly the herbaceous, vanished. With the demolishment of the vegetation cover, increasing water-soil erosion worsened physico-chemical properties of soil and, subsequently, some woody plants disappeared and barren land was finally appeared.

该生态系统的退化过程可以归纳为：来自于冶炼废气的重金属和酸沉降导致了敏感植物的消亡，丧失了对土壤的缓冲保护作用；重金属在土壤表层的积累，酸性物质在土壤表层的增加导致的土壤酸化以及由此引发的有机质与养分的淋溶和重金属及Al的活性增加，加剧植被的快速退化，特别是浅根植物的衰亡；地被层的破坏，导致水土流失和土壤侵蚀加深，进一步恶化表层土壤的理化性质，一些木本植物随之消失，最终形成光板地。

Methods Clinical data of 3 cases of bile duct injury during laparoscopic cholecystectomy were analyzed retrospectively.

回顾总结3例LC术中胆管损伤的临床资料，分析3例胆管损伤的原因及对策。

These techniques are applied to the gobang.

本文将这些技术用于五子棋中。