Freshwater and brackish blue-green algae were collected at 43 freshwater and brackish sites (including lakes, ponds, swamps, streams, and rivers and estuaries) throughout South Korea from March 2017 to October 2018, and were identified using light microscopy. A total 223 taxa in freshwater and 230 taxa in brackish waters in 2017 and 274 taxa in fresh and brackish waters in 2018 were identified and among them, 20 taxa were unreported taxa of blue-green algae in Korea; The new recorded taxa were Aphanocapsa marina, Calothrix fusca f. durabilis, Calothrix littoralis, Calothrix parva, Chamaesiphon minimus, Chroococcidiopsis cubana, Chroococcidiopsis fissurarum, Coelosphaerium aerugineum, Dolichospermum mendotae, Eucapsis alpine, Gomphosphaeria cordiformis, Gomphosphaeria natans, Merismopedia danubiana, Lynbya aestuarii var. gaditana, Tolypothrix tenuis, Pseudocapsa maritima, Pseudocapsa sphaerica, Pseudophormidium tenue, Trichodesmus sp. and Woronichinia elorantae.

This study identified the current condition of a long-term forecast and analyzed the demand characteristics in accordance with each field. The detailed policy plans of a long-term forecast and its follow-up task include the following. First, the need for promotion of a long-term forecast and the name of a ‘long-term forecast’ should be promoted. Second, the media of offering information needs to be promoted. Third, an in-depth survey of each segmented industry should be conducted. Fourth, it is necessary to prepare a tailored information system. Fifth, there is a need for establishing an information data delivery system according to corporate size. Sixth, it is required to provide relevant authorities with information in consideration of a regional scale. Seventh, the support of weather policies regarding a longterm forecast should be increased.