摘要
针对河北省沧州地区农业用水紧张的现状与事实,采用投影寻踪回归方法,对造成这一事实的人为和自然因子进行了量化评估,结果发现:人为因素和自然因素的贡献权重为0.787 6∶0.212 4。自然因子中的降水、气温、自产水的贡献权重分别为0.119 50、.060 5和0.032 3。在种植业内部,主要驱动因子是冬小麦、玉米、棉花、蔬菜等主要作物的灌溉用水,贡献权重分别为32.2%、6.8%、4.0%、12.2%。
According to the tense situation of agricultural water in Cangzhou Region of Hebei Province, the human factors and natural factors causing the situation are quantitatively evaluated by using projection pursuit regression (PPR) method. The result shows that the contribution ratio of human factors and natural factors is 0. 787 6 and 0. 212 4, respectively. In the natural factors, the contribution ratio of rainfall, temperature and self-production water is 0. 119 5, 0. 060 5 and 0. 032 3. In the planting factors, the main driver factors include the irrigation water of wheat, corn, cotton, vegetables, and the contribution ratio of which is 32. 2%, 6. 8%, 4. 0% and 12.2%.
出处
《节水灌溉》
北大核心
2008年第8期1-4,共4页
Water Saving Irrigation
基金
国家"十五"科技项目(2001BA5080B02-06)
唐山市气象局创新科技项目(TSQX2007KY0702)
关键词
农业用水
驱动因子
驱动贡献
agricultural water
driver factors
contribution ratio