鄂西山区森林火灾的分布特征及与地形气候的关系

HORIZONTAL AND VERTICAL DISTRIBUTION OF FOREST FIRE DISASTERS IN WESTERN HUBEI AND ITS CORRLEATION WITH TOPOGRAPHIC CLIMATE

本文揭示了鄂西山区森林火灾水平分布特征:1)森林火险具有地域差异性和邻近相似性,2)从北到南火险由高到低;3)高山林区为低火险区,4)23林区县市为低火险级;5)1600—2000m左右火灾最多发生,向上向下均减少。

This paper first reveals horizontal distribution property of six forest fire index in western Hubei: ( 1 ) Forest Fire Danger (FFD) shows geographic differentiation and similarity. (2) FFD decreases from north to south. (3) Northwestern part of Hubei proviuce is the highest FFD district; ( 4 )2/3 part of counties (cities) belongs to low FFD. Then it analyses the vertical structure of forest fire index, height from 1600 to 2000m has the highest fire index, and thd index decreases at either higher or lower height.The above characteristics can be reasonably explained by distribution of terrain and its microclimate.