ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
1. Introduction
Water is a very valuable resource, sustaining human life, production processes, and ecosystems; thus, particular attention should be paid to the management of water resources. China is now facing a serious water crisis, including water shortages, flooding, and water pollution, due to both natural and artificial causes. This water crisis has threatened human health and economic development. Natural water resources in China have two main characteristics. First, they are insufficient: Water availability in China is only 1780 m3 per capita, which is one quarter that of the global value and very close to the universally accepted figure for countries lacking water resources (≤ 1700 m3 per capita). Second, they are unevenly distributed: Although there are rich water resources in South China, there is a lack of water in North China. North China possesses 47% of the population and 65% of the farmland, but only 17% of China’s water resources. In addition, rainfall is unevenly distributed over the four seasons in China.