西北古代农田水利开发的三个高峰

On Three Pinnacles of Development of Ancient Irrigation and Water Conservancy in Northwest Regions

中国古代西北的农田水利开发,受制于两个因素:一是国家的军事活动,二是中央政府的投资力度。西北的军事活动几乎无代无之,历代中央政府为了解决军需供应问题,无不在西北设立屯田和开发水利资源,但由于不同时代国家的统一幅度、内部和谐程度不同,可用于投资的人力、物力、财力不同等原因,遂使不同时代西北水利开发呈现出高低波动的曲线,且在汉、唐、明清出现三个高峰期。

Ancient irrigation and water conservancy in northwest regions were restricted by two factors.military activities of country, and investment from central government. In northwest regions, there were quite a lot military activities in every dynasty, and central governments were developing irrigation and water conservancy. However, the investment of labor force, material resources, and financial support from different central governments was different. Thus, there appeared three pinnacles： Han, Tang, Ming and Qing Dynasties.