Open AccessIdentify soil acidification due to reclamation of coastal potential acid sulfate soils from shrimp farming activities in Can Gio, Ho Chi Minh City
Author(s) -
Tran Bao Tran,
Ha Quang Hai,
Nguyen Thuc Boi Huyen
Publication year - 2018
Publication title -
khoa học và công nghệ: trái đất và môi trường
Language(s) - English
Resource type - Journals
ISSN - 2588-1078
DOI - 10.32508/stdjsee.v2i1.472
Subject(s) - sulfate , soil water , soil ph , environmental chemistry , environmental science , jarosite , shrimp farming , soil acidification , land reclamation , hematite , wetland , chemistry , soil science , mineralogy , ecology , aquaculture , biology , organic chemistry , fishery , fish <actinopterygii>
Soil acidification is one of the top concerns of the coastal wetland areas. In recent decades, by reclamation of coastal potential acid sulfate soils for agricultural activities (rice field, shrimp farming,...), humans have caused soil acidification. pH and the presence of secondary iron minerals (hematite, goethite) and ferric iron minerals (jarosite, schwertmannite, copiapite) are considered as the indicators of acidic soil. This study is to rapidly detect acidic status of soil through identifying secondary iron minerals by characterized band ratios. Sentinel-2A data with B4/B2 and B11/B8 can determine iron oxides and ferric iron minerals. The identified spectral result of fallowed ponds on ratio images shows the correlation with measured pH and mineral composition data (XRD). This research promises applicability of used band rationing method as well as potential of Sentinel-2A data in monitoring soil acidification in coastal wetland areas.