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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,参考作物腾发量在时间尺度上具有自相似性特点。基于此,以分形原理为理论框架,研究了参考作物腾发量时间尺度自相似结构,寻求了参考作物腾发量时间无标度区间。将此理论运用于韶山灌区,取得了满意结果,对解析参考作物腾发量时间规律具有重要理论和实际意义。
Due to the physiological mechanism of the crop itself and the non-linear and non-stationary stochastic changes of the meteorological factors in the near-surface layer, the reference crop evapotranspiration has the characteristics of self-similarity on the time scale. Based on this, taking the fractal principle as the theoretical framework, the time-scale self-similar structure of reference crop evapotranspiration was studied and the reference time scale of crop evapotranspiration was sought. Applying this theory to Shaoshan Irrigation District has achieved satisfactory results, which has important theoretical and practical significance for analyzing the time law of reference evapotranspiration.