地理科学 ›› 1982, Vol. 2 ›› Issue (3): 238-246.doi: 10.13249/j.cnki.sgs.1982.03.238

• 论文 • 上一篇    下一篇

东北地区年径流的多年变化规律及预测

李秀云   

  1. 中国科学院地理研究所
  • 出版日期:1982-05-20 发布日期:1982-05-20

REGULARITY OF PERENNIAL VARIATIONS IN ANNUAL RUNOFF FOR NORTHEASTERN CHINA AND ITS PROGNOSIS

Li Xiuyun   

  1. Institute of Geography, Academia Sinica
  • Online:1982-05-20 Published:1982-05-20

摘要: 东北地区大致界于北纬40°—53°30′,东经120°—135°之间,处于我国的东北部,其南北长约1500公里,东西宽约1100公里。气候属于温带,其中黑龙江省北部为寒温带。本区西部是东北—西南走向的大兴安岭山脉,东北部为小兴安岭山脉,东部分布有张广才岭和长白山脉等山地。山间构成辽阔的东北平原,是一个完整的地理区域单元。全区面积约占全国总面积的8%,是我国主要农业区之一,重要的商品粮基地。

Abstract: This region is located at 40°—53°30’N and 120°-135°E in the temperate zone.It is one of the main commodity grain bases of China and of areas with aboundant water.The regularity of distribution of runoff is rougthly coincident with that of annual precipitation.Both of them gradually reduce form south-east to north-west.The perennial change values are large,the maximum value of Cv is above 1.0 and the lower value is below 0.3.The annual runoff regularly changes with alternativeplentiful-drought cyclical period and this cyclical period is the longest in China(60—80 years).The analysis of annual runoff in plentiful and drought period can reflect the basic drought and waterlogging situation of this region.The cyclic analysis of annual runoff shows:change of eyclical period at Haerbin Station is different from that at Shuifeng Station(about 52 years for Haerbin Station and about 32 years for Shuifeng Station).This shows there is rather great difference of annual runoff in the northeastern region in geographical distribution.Furthermore,we can prognosticate qualitatively and quantitatively the annual runoff of this region by using the method of mean sliding periodic trend of annual runoff to provide a scientific basis for exploitation and utilization of water resources in a planned way.