Analysis of flood discharge using Snyder and Melchior methods at Krueng Meureubo watershed in Pasi Mesjid village

Abstract

Pasi Mesjid villages in Meureubo district are vulnerable to floods in the rainy season. Every year, the village was flooded and submerges many houses, rice fields, and plantation land owned by residents. The phenomenon of annual flooding is a concern for the local community because it causes material losses. Research on the flood discharge in the Meureubo watershed, Pasi Mesjid Village, was carried out to determine the amount of flood discharge with various return periods. The flood discharge calculation methods are using Melchior and Snyder. The scope of this study includes frequency analysis, rainfall design, flood discharge design by the Melchior and Snyder methods with return periods of 2, 5, 10, 25, and 50 years. The hydrological analysis results showed that the flood discharge values of the Snyder and Melchior methods were not much different, namely in the 2-year return period of 1607.77 m3/s. With the Melchior method, a 2-year return period obtained the plan flood discharge of 1813.286 m3/s, a 5-year return period of 2791.62 m3/s, a 10-year return period of 2938.14 m3/s, a 25-year return period of 3153.19 m3 / s, and a 50-year return period of 3336.5 m3/s. With the Snyder method, the 5 (five) year return period is 2374.710 m3/s, the 10 (ten) year return period is 2762.09 m3/s, the 25 year return period is 3284.96 m3/s, and for the 50 year return period, the value is 3699.18 m3/s. Based on this analysis results, the Snyder and Melchior methods can be used in analyzing the flood discharge in the Meureubo watershed area.