i04_CIMIS_Reference_Evapotranspiration_Zones_v1999

<div style='text-align:Left;'><p><span style='font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;'>The ETo Zones Map allows users to view the grass-reference evapotranspiration (ETo) Zones for the State of California. The map was developed by DWR and UC Davis in 1999 and divides the State into 18 zones based on long-term monthly average ETo. The ETo values were calculated using data from various data sources, including CIMIS weather stations that had at least five years of archived data. This dataset is the version from 1999.</span><br /></p></div>

本ETo分区地图可用于查看加利福尼亚州的草本参考蒸散发（ETo，grass-reference evapotranspiration）分区。该地图由加州水资源部（Department of Water Resources, DWR）与加州大学戴维斯分校（University of California, Davis, UC Davis）于1999年联合研发，依据长期月均ETo值将全州划分为18个分区。ETo值通过多源数据计算得到，数据来源包括至少具备5年存档观测数据的加州灌溉管理信息系统（California Irrigation Management Information System, CIMIS）气象站。本数据集为1999年版。