地理科学 ›› 1983, Vol. 3 ›› Issue (2): 103-108.doi: 10.13249/j.cnki.sgs.1983.02.103

• 论文 • 上一篇    下一篇

新水热平衡联系方程的建立及其在水文学应用的可能途径

吴厚水   

  1. 广州地理研究所
  • 出版日期:1983-03-20 发布日期:1983-03-20

A NEW CONNEXION EQUATION OF HEAT AND WATER BALANCES AND ITS APPLICATINO TO HYDROLOGICAL PRACTICES

Wu Houshui   

  1. Guangzhou Institute of Geography
  • Online:1983-03-20 Published:1983-03-20

摘要: 对于多年平均情况,地表面水分平衡可表示为:r=f+E (1)式中r为平均年降水量(毫米);f为平均年径流量(毫米);E为平均年蒸发量(毫米)。对全年平均情况来说,地表面热量平衡可用简化方程表示:R=P+LE (2)式中R为年辐射平衡(千卡/厘米2);P为年乱流热通量(千卡/厘米2);L为蒸发潜热,约等于0.59千卡/克。上述两个方程,除常数L外,尚有5个分量,通常需要有其中三个因子方能求解。

Abstract: Based on considerations of the relationship between the evapotranspirationand the humidthermal conditions,a new connexion equation of heat and waterbalances has been developed:E=(R/L)em(R/Lr) Where E is the mean annual evapotranspiration;R,the annual radiation balance;r,the annual precipitation;L,the latent heat of evaporation;and m,anempirical coefficient.The results obtained from calculating the annual values of evapotranspirationfor some stations in the Yellow River Basin and South China by the new equation,as compared with those calculated from water balance data,are similar andacceptable.As conclusion,the application of the new equation to hydrological practicesis found to be reasonable.