论文部分内容阅读
一、知识讲解(一)水资源危机产生的原因1.自然原因全球真正可有效利用的淡水资源有限;从水资源的分布来看,水资源的时间和空间分布不均,这使得某些地区在某一时段内可利用的水资源量相应减少;气候异常,如全球气候变暖,降水减少、气候干旱,也导致了水资源的不断减少。2.人为原因水资源需求量大。从水量上来看,随着工农业发展和生活水平的提高,人们对水资源的需求量不断增加,人类需水量的增长速度超过了大自然供水
First, the knowledge to explain (A) the causes of water crisis 1. Natural causes of the world’s truly effective use of fresh water resources are limited; from the distribution of water resources, water resources, time and space unevenly distributed, which makes some areas The amount of water available for a given period of time is correspondingly reduced; climate anomalies, such as global warming, declining precipitation and arid climate, have also led to a steady decline in water resources. 2. Man-made water resources demand. From the water point of view, with the development of agriculture and industry and living standards, people’s demand for water resources continue to increase, human water demand growth rate exceeds the nature of water supply