The two files were presented in general lecture of geology at Dept of Geology, Universitas Sriwijaya. The event was conducted on 13 - 14 November 2018. I wrote both files using R markdown available on this Github Repository https://github.com/dasaptaerwin/pubanalytics/blob/master/article_about_ID/ .
Associated files and links
Session 1: landscape_hydrology.pdf
Session 2: WOS_ID.pdf
Addition files: the future of hydrogeology https://www.slideshare.net/d_erwin_irawan/the-future-of-hydrogeology