地理信息系统与数学模型集成技术在福建甘蔗气候适生地评价中的应用

利用福建省气象要素观测数据与土地利用现状资料,探讨GIS与数学模型集成技术在福建甘蔗气候适生地评价中的应用。结果表明,2次方趋势面分析结合1、2、5、7、6次方反距离权重插值模型可分别适用于研究区年降雨量、≥20℃年活动积温、年日照时数、无霜期、年极端低温多年均值的气象因子空间数据库的准确推算,其验证气象站点观测值与上述模型推算值之间的差异均未达到显著水平,t值仅分别为0.780,0.006,0.308,0.120,0.878。借助地理信息系统与数学模型可实现福建省甘蔗气候适生地定位与定量的评价,研究区甘蔗气候适宜用地面积为119.09万hm2,占全省耕地总面积的86.85%,其中最适宜用地面积、适宜面积、次适宜面积分别占甘蔗气候适宜用地面积的23.54%、39.73%、36.73%。

Application of GIS and Mathematic Models on Evaluating the Climate Suitability of Land Resources for Sugarcane in Fujian Province

Based on the meteorological elements observation and the data of soil utilization actuality in Fujian Province,the GIS and integrated mathematic models were applied to evaluate the climate suitability of land resources for sugarcane.The results showed that combining the Trend-surface model of two power and Inverse distance weighted interpolation of one power,two power,five power,seven power,six power could well estimate the spatial grid datum of annual mean rainfall,annual mean accumulative temperature beyond twenty degree,annual mean hours of sunlight,annual mean non-frost day and annual mean extreme low temperature.These annual means estimated by the models did not differ greatly from observed data,and t test value were merely 0.780,0.006,0.308,0.120 and 0.878,respectively.The climate suitability of land resources for sugarcane in Fujian Province could also be positionally and quantificationally evaluated by means of GIS and integrated mathematic models.The suitable climate land areas for sugarcane were 119.09×104 hectares in investigative regions,which accounted for 86.85% of all the areas of cultivated land in Fujian Province.The most suitable,more suitable and secondary suitable regions respectively accounted for 23.54%,39.73% and 36.73% of the suitable climate land resources for sugarcane.