大沙河

大沙河是大连普兰店市的一条主要河流，是该市重要的饮用水、农业供水水源。

Dasha River is one of the main rivers in Dalian , and it supplies water source of drinking and agriculture for the city .

结论大沙河保护区的两栖动物资源丰富，具有保护价值。

Conclusions There are rich amphibian resource in the area witch should be protected .

此外，就大沙河底泥毒物的治理方法提出了自己的见解。

Moreover , it proposes views and ideas of administrating the Dashahe bottom sediment poison pollution .

大沙河和玛莎是两姐妹，爱制造和销售汽车，但是他们更热爱赛车！

Dasha and Masha are two sisters that love building and selling cars , but love racing them even more !

文章结合桐城市大沙河獾洞治理的实践对堤防獾洞危害及防治措施进行探讨。

In this paper , Tongcheng Dasha badger hole governance practice in badger holes embankment hazards and preventive measures are discussed .

还结合化学监测方法，分析了大沙河底泥毒物主要为有机毒物。

Besides , this article , with chemistry monitoring means , analyzes that the poison in the bottom sediment is mostly organic matter .

运用生物毒性监测方法，对深圳市南山区大沙河底泥毒物污染特征进行了分析。

This article , by means of biological toxicity tests , analyzes the feature of the bottom Sediment poison pollution in the Dashahe River .

结果表明，大沙河底泥不同程度受到了毒物污染，底泥毒物污染趋势与水体毒物污染趋势基本一致；

Results show as follows : the tendency of the bottom sediment pollution is essentially the same as that of the water body poison pollution .

通过数学模型定量的计算了大沙河流域人类活动对泥沙输移减少的贡献率平均为65.6%，而同期径流和降雨对泥沙减少的贡献率平均则为34.4%。

The average contributive ratio affecting soil erosion by human activities is 65.6 % , and at the same period the contributive ratio by runoff and rainfall is 34.4 % .

中国东亚飞蝗新类型蝗区&海南热带稀树草原蝗区的生态地理特征及其与大沙河蝗区比较

A new type of locust area in china ── the ecological geography characteristics of the tropical savannah locust area in Hainan as compared with the river delta type of locust area