流域参考作物腾发量分布式计算模型  

A Distributed Model of Reference Crop Evapotranspiration Based on the DEM of Shiguanhe River Basin

作　　者：安贵阳[1,2] 郝振纯[3] 

机构地区：[1]浙江省水利水电勘测设计院,浙江杭州310002 [2]浙江大学海洋学院,浙江舟山316000 [3]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098

出　　处：《安徽农业科学》2016年第17期1-3,49,共4页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金项目(41371047);中国科学院战略性先导科技专项(XDA05110102);浙江省水利厅科技项目(RC1524)

摘　　要：地形(坡度、坡向、地形遮蔽等)对太阳辐射的空间分布影响显著,并进而造成了参考作物腾发量(ET0)空间分布的巨大差异。基于淮河史灌河流域数字高程模型(DEM)对参考作物腾发量计算模型中所涉及的几个参数(包括气压、温度、辐射)进行地形校正,改进并建立了考虑地形影响的流域参考作物腾发量计算模型。结果表明,改进的参考作物腾发量计算模型的计算结果的空间分布差异显著,更好地反映了地形对于ET0空间分布的影响。辐射和ET0随着坡向的变化由南坡至北坡依次减少。该研究结果提高了起伏地形影响下ET0空间分布估算的精度,并为流域水资源综合规划和利用提供重要依据。The spatial distribution of solar radiation is significantly impacted by topography （slope, aspect and terrain inter-shielding） and in turn makes large differences in spatial distribution of reference crop evapotranspiration .Parameters （ vapor pressure, temperature and solar ra-diation） strongly related to topography were adjusted based on the digital elevation model （DEM） of Shiguanhe River Basin, then a distributed model of reference evapotranspiration was established to calculate reference crop evapotranspiration. The results showed that spatial variation of reference crop evapotranspiration is obvious for the reference evapotranspiration and is strongly related to the topography .Solar radiation and reference evapotranspiration in southern slope is bigger than others and in northern slope is smallest.The model is helpful for improving the es-timation of regional reference evapotranspiration, water resources planning and utilization.

关 键 词：参考作物腾发量 数字高程模型 分布式模型 史灌河流域 

分 类 号：P334.1[天文地球—水文科学]