水土

Starting with an analysis of the characteristics of the water resource of the Qiantang River and the present situation of its exploitation and utilization, this paper suggests a comprehensive exploitation of the water resource of the river in six respects:(1) the establishment of an administrative system for the comprehensive exploitation of the water resource in the river valley;(2) the establishment of a transfluvial navigation system;(3)the enhancement of the exploitation of tourist resources;(4) the...

本文从分析钱塘江水资源特点及开发利用现状着手，提出了综合开发钱塘江水资源的六个方面即：建立流域水资源综合开发管理体系、建立跨流域航运网络、大力开发旅游资源、河口潮汐能的开发利用、防治水污染和保持水土涵养水源，为进一步综合开发、充分利用钱塘江水资源提供依据。

Clover:Any of various herbs of the genus Trifolium in the pea family, having trifoliolate leaves and dense heads of small flowers and including species grown for forage, for erosion control, and as a source of nectar for honeybees.

苜蓿，三叶草：一种豆科三叶草属的草本植物，长有三小叶，开密簇小花，包括用作饲料的、防止水土流失的及作为蜜蜂蜜源的品种

During the establishment of sediment yield dynamic model at the watershed outlet, it was difficult for us to carry out dynamic monitoring of each impact factors in the whole basin, because it was a long time research and was in very large-scale watershed. Taking into account the interannual variability of sediment yield mainly affected by hydrological conditions of rainfall - runoff and underlaying surface changes caused by soil conservation measures, a combined influence factor which is related to surface runoff modulus and the implementation time of the water and soil conservation project was proposed for the first time. Furthermore, its specific expression was determined through dimensional analysis and non-linear regression multianalysis.

在流域输沙量动态模型的建立中，由于研究时段长、研究流域尺度大，对输沙量各影响因子进行全流域逐年动态监测十分困难，考虑输沙量的年际变化主要受降雨-径流水文条件和水土保持措施等土地管理活动的影响，首次提出与地表径流模数和治理时间相关的综合影响因子，并通过因次分析法和二元非线型回归法确定了具体的表达式。

Correlation analysis of area change and its constituent of farmland in Guangdong province indicated that the adjustment of agricultural structure and the use of unstatistic land were critical to the decrease in farmland. The former was used for fishpond and the later occupied 1/3 of the decreased area.

水土保持与荒漠化防治论文：采用统计方法，对广东省历年耕地及其构成进行相关分析，结果表明广东省耕地减少的原因主要是农业结构调整和其它未统计耕地减少；在近几年未统计耕地减少和结构调整中的改鱼塘占用分别约占耕地总减少量的1/3。

In the dissertation,Guizhou Province andGuiyang.Guizhou Province were selected as the research area and the model region.With theguidance of knowledge discover in database and soil erosion theory,remote sensing and GISwere used to study the senior and the primary method of obtaining the soil erosion message,which are based on unstructural knowledge discover in database.All the methods wereapplied to survey the soil erosion in Guizhou and to monitor the soil erosion change inGuiyang,all of the achievements enhanced the water-soil conservation in the research areaand the model region.

本文在知识发现和土壤侵蚀理论指导下，应用遥感和地理信息系统技术，选择贵州省为研究区，贵州省贵阳市为研究样区，进行了基于非结构性知识发现的土壤侵蚀信息提取方法初级方式和高级方式的研究，并把它们应用到研究区和研究样区的土壤侵蚀调查和土壤侵蚀动态监测工作中，促进了研究区的水土保持工作。

Drought tolerance capacity of Vetiveria zizanioides is much better under high temperature in summer.It can tolerate drought from 24 to 42 days.

香根草Vetiveria zizanioides是禾本科C4植物，原产于热带，具有良好的水土保持功能，过去几十年里在全球的热带和亚热带地区迅速推广应用。

Therefore, it is feasible to popularize Vetiveria zizaniodes cultivation to protect the slope of spoil ground along the expressway.

因此，高速公路弃土场的水土流失生态治理可大力推广应用香根草生态护坡技术。

Northwest Institute of Soil and Water Conservation, Academia Sinica and the Ministry of wanter Conservancy

中国科学院水利部西北水土保持研究所，陕西杨凌 712100

The whole ecological benefit shows downtrend, especially the area of nutrient waterhead and water and soil benefit in forest get large, and on the contrary the forest area lessens.

整体森林生态效益价值呈下降趋势，特别是森林的涵养水源和保持水土效益价值在森林面积增加的情况下反而下降。

In order to harmonize economy development with waterhead conservation,the main woodland factors that significantly affected the soil erosion were analysed and sorted with quantitative theory in woodland unit of subcompartment, and 339 peaces of aggregately sorted by grade without overlap.

根据北京市&八五&森林资源调查和实地调查数据，从发展经济与水源保护相协调的宗旨出发，以小班为研究单元，应用数量化理论对水土流失有重要影响的主要立地因子进行了分析和排序，运用聚类分析方法，对密云水库北庄示范区339个小班进行了不重叠内在等级聚合分类，将示范区划分为6个立地类型。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。