Application of non-parametric approaches to identify trends in streamflow for the Mae Klong River Basin, Thailand

Abstract Mean monthly streamflow records of ten gauging stations in the Mae Klong River Basin, Thailand, were analyzed for trends using non-parametric approaches period 2000–2015. The statistical significance was tested on monthly, seasonal, and annual scales three tests; Mann–Kendall (MK), Spearman's rho (SR), innovative trend analysis (ITA) a 5% level. grouped into two categories: naturalized (four stations) regulated (six stations). In both dry wet seasons, decreasing observed inflows to Srinagarind Vajiralongkorn Dams. On an basis, all showed trends. For stations, season, four out six increasing trends, while five indicated by MK SR tests, ITA method stations. results this study can help water resources managers better assessment planning basin.