References
- Tallaksen, L.M., Hisdal, H. and van Lanen, H.A.J. (2009). "Space-time modelling of catchment scale drought characteristics." J. Hydrol., Vol.375, pp.363-372. https://doi.org/10.1016/j.jhydrol.2009.06.032
- Sung, J.H. and Chung, E.S. (2014). "Application of streamfolw drought index using threshold level method." J. Korea Water Resources Association, Vol. 47. pp.491-500. https://doi.org/10.3741/JKWRA.2014.47.5.491
- http://www.skudesgare.net/ShuaiZhang22/re-xgboost20170306