›› 1987, Vol. 7 ›› Issue (2): 146-153.

• 论文 • 上一篇    下一篇

粤北山区水量供需平衡分析

何亚寿   

  1. 广州地理研究所
  • 出版日期:1987-04-30 发布日期:1987-04-30

ANALYSIS OF THE WATER SUPPLY-DEMAND BALANCE IN THE MOUNTAIN AREAS OF NORTHERN GUANGDONG

He Yashou   

  1. Guangzhou Institute of Geography
  • Online:1987-04-30 Published:1987-04-30

摘要: 粤北山区行政上包括韶关市13个郊县,属亚热带季风气候区,雨量充沛,径流丰富。多年平均降雨量1724毫米,合529亿立米。年平均降雨变幅为1300~2400毫米,降雨主要集中在4~9月。前汛期多,后汛期少。4~6月雨量约占45~50%。山区和迎风坡多,河谷、盆地和背风坡少。由于时空分布不均,给水资源调节利用和农业生产带来了困难和影响。多年平均径流深1023毫米,合径流总量312.85亿立米,每人平均7426立米,每亩平均8323立米。年平均气温19~21℃,南北气温相差3℃左右。最冷1月平均气温北部为9℃,南部为12℃,极端最低温-3~-7℃。最热7月平均气温28~29℃,极端高温达42℃。由于气温高,蒸发量大,增加了农业耗水量。据环保部门监测和分析,本区河流水质除在城镇和厂矿附近河段有些污染外,其余水质良好,符合各种用水标准。

Abstract: Based on investigation of water conservancy projects and various kinds of water use in the mountain areas of northern Guangdong province,this paper analyses the water,supply-demand balance in different periods.According to calculation,the available amounts of water supply at present (in 1983),in the near future:(in 1990)and in the long-range (in 2000)are 31.43×108M3 41.31×108M3,and 55.13×108M3respectively,while the amounts of water demand 38.02×108M3,45.78×108M3and 57.67×108M3 respectively and the amounts of water lack 6.59×108M3,4.47×108M3and 2.54×108M3 respectively.At present the situation of water lack is very serious because of the lack of water conservancy facilities and poor management.In this area water use is mainly in agriculture and the utilization late of water resources is still very low,only 17.8% of the runoff volume (P=90%).So the potentiality of water use is very remarkable.The water supply could be increased greatly at the long range.However,water demand cannot be met due to the limitation of building conditions in some counties.In order to solve this problem it is necessary to reform the composition of crops in those farmlands which are not under irrigation.The paper also puts forward suggestions on the construction and management of water conservancy pcojec}s and various kinds of water use,which provides a scientific basis for wafer conservancy and construction,development scale of industry and agriculture,and their rational distribution in the mountain areas of northern Guangdong.