HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Related articles in JEQ Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Web of Science (3) Citing Articles via Google Scholar Google Scholar Articles by Jun, S.-C. Articles by Chung, H.-J. Search for Related Content PubMed PubMed Citation Articles by Jun, S.-C. Articles by Chung, H.-J. GeoRef GeoRef Citation Agricola Articles by Jun, S.-C. Articles by Chung, H.-J. Related Collections Isotopes Nitrogen Other Environmental Contamination Water Pollution Ground Water Quality

Identification of the Source of Nitrate Contamination in Ground Water below an Agricultural Site, Jeungpyeong, Korea

^a School of Earth and Environmental Sciences, Seoul National University, Seoul 151-742, Korea
^b Rural Research Institute, Korea Agricultural & Rural Infrastructure Corporation, Sa-dong 1031-7, Ansan-si, Gyeonggi 426-170, Korea

View larger version (44K): [in a new window]   Fig. 1. Location of the study site and monitoring wells. The study site is an agricultural area that includes a rural village. The terms "w99-##" and "w00-##" are the names of monitoring wells. PRB, permeable reactive barrier.

View larger version (38K): [in a new window]   Fig. 2. Cross-correlation of ground water level and precipitation rate. (a) Ground water level and precipitation rate in w00-5; (b) result of the cross-correlation in w00-5; (c) ground water level and precipitation rate in w00-13; and (d) result of the cross-correlation in w00-13.

View larger version (30K): [in a new window]   Fig. 3. Isotopic composition and seasonal variation in ground water samples. The values in the small box show the average value of each time. GMWL, Global Meteoric Water Line; LMWL, Local Meteoric Water Line.

View larger version (20K): [in a new window]   Fig. 4. Monthly (a) average temperature and (b) amounts of precipitation.

View larger version (20K): [in a new window]   Fig. 5. Flow analysis by cross-correlation of 18O. Each length of the arrow represents the scale of the apparent velocity, and the width of the arrow represents the relative correlation coefficient. Average velocity was weighted by correlation coefficient.

View larger version (75K): [in a new window]   Fig. 6. Spatial distributions and seasonal changes of nitrate nitrogen concentration. Each circle shows the relative concentration. Each number above the circle represents the concentration. All units are mg L–1 as nitrate N.

View larger version (30K): [in a new window]   Fig. 7. Histogram of 15N values of ground water in summer and winter.

View larger version (69K): [in a new window]   Fig. 8. Spatial distributions of nitrate nitrogen concentration and 15N values. Each circle shows the relative concentration and isotopic value. All nitrate units are mg L–1 as N, and units of 15N are .

View larger version (23K): [in a new window]   Fig. 9. Diagram of nitrate nitrogen concentration versus nitrogen isotopic value. Results from winter are fitted with the Rayleigh equation, excluding the results in w99-5 and w00-12.