《珠江水利史稿》的编写工作已进行了三年,我们初步地认识了珠江流域水利发展史的一些特点,现简述如下: 一、珠江流域地理位置的重要性珠江发源于云贵高原。它是我国七大河流之一,流域面积占全国土地面积的4.6％,在国内部分为44.25万平方公里,其中山地和丘陵占流域面积的94.5％,平原面积仅占流域面积的5.5％。大部分属亚热带季风地区,形成高温多雨,雨量丰富,年降水量约 The preparation of “Draft History of Pearl River Water Conservancy” has been going on for three years. We have initially recognized some characteristics of the history of water conservancy in the Pearl River Basin and are summarized as follows: I. Importance of the Pearl River Basin Geographic Location The Pearl River originates from the Yunnan-Guizhou Plateau. It is one of the seven major rivers in our country. Its drainage area accounts for 4.6% of the total land area in the country and 442,500km2 in the domestic part. The mountains and hills account for 94.5% of the drainage area and the plain area accounts for only 5.5% of the drainage area. Most of the subtropical monsoon region, the formation of high temperature and rainy, abundant rainfall, annual precipitation about