JpGU-AGU Joint Meeting 2020

講演情報

[E] ポスター発表

セッション記号 A (大気水圏科学) » A-HW 水文・陸水・地下水学・水環境

[A-HW32] 水圏生態系における物質輸送と循環:源流から沿岸まで

コンビーナ:伴 修平(公立大学法人 滋賀県立大学)、Adina Paytan(University of California Santa Cruz)、細野 高啓(熊本大学大学院先端科学研究部)、前田 守弘(岡山大学)

[AHW32-P07] Ammonium sources in rural coastal aquifer using integrated water quality parameters: chemical, biological, and environmental isotopes

*Anna Fadliah Rusydi1,5Mitsuyo Saito2Seiichiro Ioka3Morihiro Maeda2Fujio Hyodo4Rizka Maria5Shin-ichi Onodera1 (1.Graduate School of Integrated Arts and Sciences, Hiroshima University, Japan、2.Graduate School of Environmental and Life Sciences, Okayama University, Japan、3.Institute of Regional Innovation, Hirosaki University, Japan、4.Research Core for Interdisciplinary Sciences, Okayama University、5.Research Center for Geotechnology, Indonesian Institute of Sciences, Indonesia)

キーワード:ammonium, coastal aquifer, chemical, coliform, isotope

Ammonium, although, is not regulated in drinking water quality standards, its existence is undesirable because indicated an extinction of domestic waste pollution. In Indonesian coastal aquifer, the dominant presence of ammonium compared to other dissolved nitrogen parameters is not always found. In many cases, the dominant dissolved nitrogen parameter is a nitrate, while ammonium is usually detected in land-use that is heavily impacted by domestic waste, such as densely populated residential and land-fill. Interestingly, in our research area, we detected a dominant existence of ammonium in many types of land-uses, which is not only limited to the area that suspected polluted by domestic waste. Our preliminary results from 46 groundwater samples show ammonium is dominant compared to nitrate at almost samples. Meanwhile, samples from the river (4) and spring water (2), those are taken as a comparison, are dominated by nitrate. Through this research, we analyze the source of ammonium by analyzing major elements, coliform bacteria, and ammonium isotope in order to evaluate coastal aquifer vulnerability towards ammonium contamination.