# Analysis and Prioritization of the Floating Photovoltaic System Potential for Reservoirs in Korea
## 5 Conclusions  
In this study, we analyzed the water level data of 3401 reservoirs in Korea using OpenAPI and extracted reservoirs suitable for floating PV installation. In this analysis, the conditions of an average reservoir water depth greater than 5 m and minimum water depth greater than 1 m were considered. GIS spatial analysis was applied to the TMY dataset to predict the national distribution of solar irradiance for shadow conditions. Assuming an expected power production of 10% of the area of all reservoirs satisfying the conditions, the annual power production was estimated to be 2932 GWh, and the annual GHG reduction amount was estimated to be 1,294,450 ton. In particular, Joellanam-do has many reservoirs, including many suitable for floating PV installation because of high solar irradiance. The results of this study can be used to estimate priorities and potentiality prior to actual floating PV installation and detailed analysis. This study did not take degradation into consideration because it is aimed at estimating priorities through relative comparisons. However, as floating PV is installed in the water, it is necessary to study the efficiency change and degradation related to the moisture in actual installation.  
The results of this study are very useful for preliminary evaluation at the national level, but improvement is needed in the following points. First, there may be a limit to the prediction accuracy in that only 16 data points are used to predict the solar irradiance. If the irradiance is measured at many more points, accurate irradiance prediction can be made. However, because of budget limitations, it is necessary to continuously increase the number of solar irradiance observation points at the government level. It is also possible to improve the accuracy of solar irradiance prediction through complex analysis with satellite image data. Next, the water level data used in this study is not well managed by the government, and some data are missing or include errors. In this study, we manually identified and corrected these errors. To reflect water level data in real time during the operation of the floating PV in the future, more thorough management of water level data is needed. In addition, this study was carried out to evaluate reservoirs suitable for floating PV installation and to evaluate their overall potential. However, to actually install floating PV in individual reservoirs, a more accurate analysis of the area's solar irradiance, wind speed, accessibility, detailed topography, and other conditions needs to be implemented. Finally, since SMP and REC prices are constantly changing, it is necessary to periodically consider the economic feasibility. The results of this study have important implications in Korea for large-scale floating PV installation in the future. For the successful application of floating PV, a rigorous feasibility assessment and planning for the redistribution of profit is most important, to minimize environmental damage and repudiation from the local residents.  
[PERSON] conceived and designed the analysis. [PERSON]-[PERSON] and [PERSON] performed the analysis. [PERSON]-[PERSON] and [PERSON] developed the code and analyzed the data. [PERSON] contributed reagents/materials/analysis tools. [PERSON]-[PERSON] wrote the paper.  
This research was funded by the National Research Foundation of Korea (NRF) (No. NRF-2017R1A2B4007623). This research was supported by the Brain Korea 21 Project.  
The authors declare no conflict of interest.