Peer review declaration

All papers published in this volume of IOP Conference Series: Earth and Environmental Science have been peer reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing. • Type of peer review: Double-blind The author’s information on the paper were removed before sent it out to the reviewers. The authors only receive the comments of papers without reviewers’ information. • Conference submission management system: All paper submissions were done under Easychair Conference Management System • Number of submissions received: 40 • Number of submissions sent for review: 40 • Number of submissions accepted:18 • Acceptance Rate (Number of Submissions Accepted / Number of Submissions Received X 100): • Average number of reviews per paper: 2 to 3 • Total number of reviewers involved: 44 • Any additional info on review process: The review process for each paper took around 1 to 2 month/s. The acceptance paper for IOP publication was based on the suggestions from the appointed reviewers. In the case of contradict decision of acceptance (accepted of reject)/suggestion for publication between two reviewers of the paper, the final selection was made based on either weighted all comments or initiated the third reviewer for new weighted selection. • Contact person for queries: Dr Rohayu Haron Narashid Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Perlis Branch, Arau Campus, 02600 Arau, Perlis, Malaysia rohayuharon@gmail.com OR rohayuharon@uitm.edu.my