## Materials and Methods
### Input Datasets  
Three input datasets to assess the irrigation performance were collected in the five study areas. The three input datasets were the actual evapotranspiration or ETIa, net primary productivity or NPP, and reference ET or ETo. All data was sourced directly from the WaPOR portal (version 2) ([[https://wapor.apps.fao.org/home/WAPOR_2/1](https://wapor.apps.fao.org/home/WAPOR_2/1)]([https://wapor.apps.fao.org/home/WAPOR_2/1](https://wapor.apps.fao.org/home/WAPOR_2/1))). The WaPOR datasets are produced by the FRAME Consortium, led by eLEAF and comprised of the Flemish Institute for Technological Research (VITO), the International Institute for Geo-Information Science and Earth Observation at the University of Twente, and the WaterWatch Foundation. WaPOR data are gap-filled and smoothed, so all products are void of data gaps [36]. The dataset was assessed from a near 10-day dekadal to annual temporal scales over a 10-year period (2009-2018). The WaPOR database provides ETIa and NPP in three spatial resolutions (Table 2) for the five selected schemes (Table 1). Reflectance bands for the continental (L1), national (L2) and sub-national (L3) datasets are currently retrieved from the MODIS, MODIS/Project for On-Board Autonomy--Vegetation (PROBA-V), PROBA-V, and Landsat satellites respectively (Table 2). Information is embedded in visible, near-infrared, and thermal (Landsat only) infrared bands, which were used to retrieve the land surface temperature (LST), vegetation indices, and atmospheric temperature. WaPOR ETIa and NPP further relies on input from weather, digital elevation, precipitation and transmissivity data from other sources. The weather data (i.e., air temperature, relative humidity wind speed) is obtained from Modern-Era Retrospective analysis for Research and Applications (MERRA) prior to 21 February 2014 and the Goddard Earth Observing System (GEOS-5) after 21 February \begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & **Wonji** & **Metehara** & **Office Du Niger (ODN)** & **Koga** & **Zankalon** \\ \hline Average plot size in & 13.04 & 8.83 & 5.93 & 0.24 & 0.21 \\ irrigated area (ha)/CV & 6.41D.49 & 5.58D.63 & 0.46D.08 & 0.12D.50 & 0.13D.62 \\ \hline Major crops in irrigated area & Sugarcane & Sugarcane & Rice, sugarcane & Wheat, maize, potato, onion, cabbage, barley & Wheat, rice, maize, cotton, sugar beet, berseen, fava \\ \hline Area (ha) & 6130 & 6954 & 1773 & 145 & 126 \\ \hline Min(Max elevation (msl) & 15391546 & 950982 & 278286 & 20092051 & 615 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Description of irrigated scheme areas used in the product evaluation. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Dataset** & **Level** & **Spatial** & **Temporal** & **Satellite** & **Sensor** \\  & **Resolution** & **Resolution** & **Resolution** \\ \hline ETIa, NPP & Continental (L1) & 250 m & * Dekadal & MODIS & 250 m\(|\)1-day \\ \hline ETIa, NPP & National (L2) & 100 m & Dekadal & **MODIS** & 250 m\(|\)1-day \\  & & & **PROBA-V** & 100 m\(|\)2-day \\ \hline ETIa, NPP & Sub-national (L3) & 30 m & Dekadal & Landsat & 30 m\(|\)16-day \\ \hline ETo & Continental (L1) & 25 km & 1-day & - & - \\ \hline \hline \end{tabular}  
* Dekadal is approximately 10 days. It splits the month into three parts, where the first and second dekads are 10 days and the third dekad covers the remaining days in the month. ** MODIS is resampled to 100 m up to March 2014, and Project for On-Board Autonomy—Vegetation (PROBA-V) is used from March 2014 onward.  
\end{table} 
Table 2: Description of the Water Productivity Open Access Portal (WaPOR) V2.0 evapotranspiration and interception (ETIa) and net primary productivity (NPP) data products, available on the WaPOR portal [37]. 2014 [38]. The weather data is resampled using a bilinear interpolation method to the 250 m resolution. The temperature data is additionally resampled based on the DEM (90 m) of the SRTM. Atmospheric transmissivity is taken from the Meteosat Second Generation (MSG) [36].