EFFECT OF BARITO RIVER ON DRAINAGE PERFORMACE IN DADAHUP LOWLAND IRRIGATION AREA

• Main Author: Yunita, Dwi
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/62799
• Institution: Institut Teknologi Bandung

Food Estate is a presidential directive signaled by FAO to anticipate the potential threat of scarcity and world food crisis as a result of the global Covid-19 pandemic and strengthen national food reserves. The land area of 165,000 Hectares divided into 4 Blocks (Block A, Block B, Block C and Block D) will be used for the development of agricultural areas and food security as well as increasing agricultural productivity with technological and management advantages. The current condition of the infrastructure in the Food Estate area is not all in good condition and can serve all existing irrigation areas. Some of the problems that occur include the not yet optimal drainage performance at Dadahup Lowland Irrigation Area, Block A area. This area is influenced by the tides of the Barito River, when the tide occurs in the rainy season this area floods as high as 0.5 - 1.0 m for ± 2-3 months. The purpose of this study is to minimize flooding in the Dadahup Lowland Irrigation Area in high tides condition on the Barito River and during the rainy season by optimizing the existing drainage performance. Irrigation activities at Dadahup Lowland Irrigation Area are closely related to the condition and morphology of the Barito River. Dadahup Lowland Irrigation Area agricultural potential area is 21,226 Hectares and dominated by peatland. This study uses several data, including rainfall, river discharge, climatology, topography and digital elevation model (DEM), Barito River cross section, tides, land cover, cropping, and other supporting data. Drainage performance in Dadahup Lowland Irrigation Area is assessed through analysis and modeling. Hydrological analysis is conducted to obtain flood discharge which will be an input in hydraulic model by using Hec-RAS software. The output of this model is evaluated and further can be used to get recommendations whether the drainage can operate by gravity or requires a pump due to the influence of the Barito River water level.