Sand transport characterization on the foredune area of Parangtritis, Indonesia

¹ Department of Environmental Geography, Universitas Gadjah Mada, Indonesia  
² Center for Disaster Study, Universitas Gadjah Mada, Indonesia  

^* Corresponding author: malawani@ugm.ac.id

Abstract

The aim of the research are to determine the characteristics of sand deflation on Parangtritis foredune area. The development of tourism activity on surrounding area could be has a big impact to the sand transport process. Data required in this research are wind direction and its speed, the sand mass collected from sand sampler, sand grain size, roundness and sphericity, and interview from tourists. Sand that transported by wind collected by sand sampler with dimension of 0.76 cm height and 1 cm width. Sand transport rate or deflation calculated by Bagnold’s formula. The results showed that the deflation process is bigger at daytime observation that at night, it is average 2.42 g.m^-1s^-1during day and 0.03 g.m^-1s^-1during night. Each samples location have different deflation characteristics of material that transported. Grain diameters ranging from 0.318 mm to 0.395 mm with dominance texture is medium sand. Sphericity and roundness of sediment material was on a scale of 0.5 and 0.7. This natural process that occurred on the research area didn’t knowing well either by local communities or tourists. Therefore need some proper management for support the continuity of deflation process for supplying material to the main sand dune area of Parangtritis.