River Engineering and Urban Drainage Research Centre (REDAC) is the first research centre at the USM Engineering Campus which was accorded the status of Higher Institution Centre of Excellence or HICoE for service on 9^th October 2014 with a niche area on Sustainable Urban Stormwater Management.  REDAC has been active in research and consultancy projects on Sustainable Urban Stormwater Management since 1997. Among the project sponsors are Ministry of Science, Technology and Innovation (MOSTI), Ministry of Education (MoE), Ministry of Natural Resources and Environment (NRE), Ministry of Agriculture and Agro-Based Industry (MoA), Department of Irrigation and Drainage (JPS), Prime Minister’s Economic Planning Unit (EPU), Seberang Perai City Council (MBSP) and Public Works Department (PWD).

A green sustainable urban stormwater management system known as Bio-Ecological Drainage Systems (BIOECODS) was designed by REDAC and subsequently constructed at the USM Engineering Campus, Penang in 2002. BIOECODS attempts to solve three major problems commonly encountered in Malaysia namely flash floods, river pollution, and water scarcity. By implementing BIOECODS, it will help preserve the natural characteristics of the existing river ecosystem. A presentation on BIOECODS was made at the 11^th International Conference on Urban Drainage, Edinburgh, United Kingdom (UK) in September 2008.  REDAC was also involved in several DID-related projects such as the preparation of Urban Stormwater Management Planning and Design Standard for Malaysia and Second Edition Urban Stormwater Management Manual for Malaysia or MSMA, and the Preparation of Design Guides for Erosion and Sediment Control in Malaysia.  An extension of a Memorandum of Understanding (MOU) between REDAC and DID was made on 1^st August 2019 for another 3 years of collaboration on Water Security. Another MOA was also signed with PWD on BIOECODS in 9^th March 2019.

REDAC has also been very active in promoting sustainable river management through applied research on sediment transport in rivers. River models such as FLUVIAL-12, HEC-RAS, and INFOWORK-RS are used to study river morphology and the consequences for river equilibrium to be attained. A guideline titled "River Sand Mining Management" was approved by DID for use in Malaysia. The guideline was produced after an intensive fieldwork and river modeling for three rivers namely Sungai Muda, Sungai Langat and Sungai Kurau.  Flood hazard and risk assessment study is also conducted involving Sungai Muda and Sungai Pahang, taking into account recent major floods in 2003 and 2007. Recent massive flood in December 2014 affects several states especially Kelantan, Pahang, Terengganu, and Johor.  A river modelling on Sungai Pahang based on the December 2014 flood was carried out using a special grant by the Ministry of Education (MOE).  The modelling results indicate sedimentation between 1 m and 2 m along the river reach of Sungai Pahang.  The increase in river bed level should be accounted for in the design of a flood mitigation project by providing at least 1 m of freeboard for the design water level.REDAC was also involved in the study and preparation of the Integrated River Basin Management (IRBM) plan for the Sungai Perai Basin, Penang/Kedah completed in December 2019.

REDAC completed a Long-Term Research Grant Scheme (LRGS) 2011 on Water Security provided by MOE.  LRGS is the fundamental nature of research, involving the scope of a more extensive and longer period of time and requires commitment. With LRGS, peer collaboration (multi-institutional) across multiple institutions and multiple disciplines can be built, placing Malaysia on the world map in terms of fundamental research in certain niche areas.  A number of postgraduate students were produced from this grant.