学生公寓节水系统设计 学位论文.docVIP

毕业论文 题目： 学生公寓节水系统设计 学院： 班级： 姓名： 指导教师： 职称： 完成日期： 年 月 日 学生公寓节水系统设计 摘 要：中国是一个干旱缺水严重的国家。淡水资源总量为28000亿立方米，占全球水资源的6％，仅次于巴西、俄罗斯和加拿大，居世界第四位，但人均只有2200立方米，仅为世界平均水平的1／4、美国的1／5，是全球13个人均水资源最贫乏的国家之一。扣除难以利用的洪水泾流和散布在偏远地区的地下水资源后，我国现实可利用的淡水资源量则更少，仅为11000亿立方米左右，人均可利用水资源量约为900立方米，并且其分布极不均衡。到20世纪末，全国600多座城市中，已有400多个城市存在供水不足问题，其中比较严重的缺水城市达110个，全国城市缺水总量为60亿立方米。我国水资源短缺、水污染严重 、水土流失严重 、水价严重偏低、水资源浪费严重。而且南方水多，北方水少。西部水少，沿海水多。 Abstract：China is a country drought serious water shortage. For fresh water resources total 2.8 trillion cubic meters, accounting for 6% of global water resources, second only to Brazil, Russia and Canada, fourth in the world, but only 2200 cubic meters, per capita is only a quarter of the worlds average, 1/5 of the us, is one of the poorest countries in the global 13 per capita water resources. Deduction is difficult to use the flood runoff and scattered in remote areas of groundwater resources, our country reality available fresh water resources is less, only about 1.1 trillion cubic meters, the useable water resources per capita is about 900 cubic meters, and its distribution is very unequal. By the end of the 20th century, among more than 600 cities throughout the country, the existing more than 400 cities, water shortage problems, including serious water shortage city of 110, the national total of 6 billion cubic meters of water shortage city. Severe water shortage, water pollution, soil erosion is serious in China, severe water price is low, serious waste of water resources. North and south water more, less water. Less water in the west and coastal water. The enlargement of college recruit students, both in the number of colleges and universities and the number of college students in growing. The increasing water consumption, the water saving and energy saving problem that nots allow to ignore. St