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Quantities of dihydrogen monoxide have been found in almost every stream, lake, and reservoir in America today.

今天的中国,几乎所有的小溪,河流,湖泊和水库均可找到一定量的一氧化氢。

Dimidiate Pixel Model with the soil and land-use data, and NDVI were used to compute...

使用该系统,作者对东圳水库流域的土壤侵蚀模数的空间分布进行计算,并对计算的结果进行分析。结果表明,该系统模拟的结果可靠,建立的系统可以应用于实际工作中。

Corrosion process of water flow could have great impact on dissolvable rock area in several decades.

岩石风化作用既是地壳固体物质形态转变的重要途径,也是产生块体运动灾害的必要前提条件,其类型和强度受区域气温及降雨条件的控制;水的侵蚀作用的区域性规律受地貌成因和气候条件的制约,它对陆地环境的最大冲击是对海洋、湖泊及水库岸滩带的侵蚀和改造;流水的溶蚀作用可在几十年内对可溶岩类地区产生影响。

To study and evaluate the impact of different frequency's floods on social and economic development of the area of Lower weihe River in shaanxi province up the San-men-xia reservoir Employ the method of items of direct loss,namely,to exact all kinds of loss percents of everythings on the earth submersed by the flood by empirics and practical datas ,and ultimately evaluate the flooded loss of some flood standard.

研究评价三门峡水库不同频率洪水对陕西渭河库区社会经济发展的影响。采用直接损失项目法,即根据经验和实际数据确定洪水淹没的各种地表载物的损失率,估算某种洪水标准时的洪灾损失。

Total mercury and methyl mercury concentrations were analyzed by cold vapor atomic fluorescence spectrometry and aqueous phase ethylation,GC separation,and CVAFS detection.

2006年1~12月,每月采集乌江流域梯级水库入出库河流水样,用两次金汞齐-冷原子荧光光谱法和蒸馏-乙基化结合GCCVAFS法测定了水中总汞和甲基汞的浓度。

On this basis, the rainfall in the future was predicted, which was very guidable to the optimization operation of the reservoir and agricultural production in this region.

在此基础上对未来降雨量进行预测,这对该地区水库的优化调度和农业生产有重要的指导意义。

In recent years, the agricultural nonpoint pollution has threatened the water quality protection of headwater area in reservoir.

近年来,农业面源污染对水库水源地的水质保护形成了威胁。

Therefore, systematically research on protection of headwater area of reservoir hasprofound and significant meanings.

在我国南方地区,伴随着社会经济的快速发展和城市化进程的迅速推进,许多河流的中下游河段由于点源和面源污染加剧而丧失了饮用水功能,河源区段的水库已经成为目前最重要的城市集中式饮用水供水水源。

Pretank technology is one of the effective ways to prevent the nonpoint pollution in headwater area of reservoirs because it has such advantages as low expenses, suitable for many kinds of conditions.

前置库技术因其费用较低,可以多方受益、适合多种条件等优点,是目前防治水库水源地保护区内面源污染的有效途径之一。

On the other hand, these activities control the amout and quality of freshwater, for example, water used for agricultrue and industry increase, build up reservoir and unloading directly change the balance of the ecological eviromental composition such as salinity, sand, nutrious and microelement in soil, so that control the change of heteroptera Kitog.

人类活动一方面通过建设虾池、大坝及油井平台等活动直接占用了碱蓬生长的土地,另一方面它又通过控制上游淡水的水量与水质,如农业与工业用水的增加、建水库、直接排污等活动改变着区域土壤的盐度、泥沙成分、营养物质、微量元素等生境组分的平衡,进而控制碱蓬的消长。

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Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

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