机构地区: 中山大学地理科学与规划学院水资源与环境系
出 处: 《灌溉排水学报》 2005年第5期5-9,共5页
摘 要: 受作物本身生理机制以及近地层气象因子非线性、非平稳化随机变化的影响,参考作物潜在腾发量时序过程具有周期特性。基于此,根据小波分析原理,以韶山灌区30年参考作物潜在腾发量时间序列为样本,研究了参考作物潜在腾发量时序过程的多时间尺度特征,为该地区作物需水预测、农业水资源可持续利用提供了重要的理论依据。 Duo to crops' physiological mechanism and the unsteady, non-linear stochastm variation oI meteorological factors, reference crop evapotranspiration time series is characterized by its periodicity. According to Shaoshan Irrigation District series, this paper studies the multi-time scale feature of reference crop evapotranspiration. It provides a theoretical basis for the crop water requirement prediction and water sustain utilization.