Impact of land-use types on nitrate concentration and δ15N in unconfined groundwater in rural areas of Korea

Choi, Woo‐Jung; Han, Gwang-Hyun; Lee, Sang-Mo; Lee, Goontaek; Yoon, Kwang‐Sik; Choi, Soo-Myung; Ro, Hee‐Myong

doi:10.1016/j.agee.2006.10.002

Cited by 131 publications

(55 citation statements)

References 31 publications

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“…N sources from human and animal waste usually have higher d 15 N than other N sources (McClelland et al 1997;McClelland and Valiela 1998). In our study, the higher pond smelt d 15 N values in Lake Youngrang and Lake Mae compared to Lake Hwajinpo might be due to differences in N sources from the watersheds (Cabana and Rasmussen 1996;Choi et al 2007;Xu et al 2010). Lake Youngrang and Lake Mae receive N inputs from sources such as waste water and agricultural runoff, but not in Lake Hwajinpo.…”

Section: Isotopic Differences In Pond Smelt In Brackish Lagoonsmentioning

confidence: 48%

Habitat-specific variation in stable C and N isotope ratios of pond smelt (Hypomesus nipponensis)

Lee

Choi

Owen

et al. 2013

Animal Cells and Systems

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The aim of this study was to investigate differences in d 13 C and d 15 N of pond smelt (Hypomesus nipponensis) collected from three brackish lagoons, which have different characteristics, the principal one being the presence or absence of a weir located near the mouth of the outlet channel. The presence or absence of a weir is reflected in a difference in salinity among the study lakes. We found a general pattern of lower pond smelt d 13 C values in Lake Mae with lower salinity and higher pond smelt d 13 C values in Lake Hwajinpo and Lake Youngrang (lagoons with higher salinity). Pond smelt d 13 C values showed little variation among the three lagoons related to pond smelt length, but likely reflected the availability of freshwater prey in Lake Mae. Among the lagoons, we found that pond smelt d 15 N values were lower in Lake Hwajinpo compared with pond smelt d 15 N values in Lake Youngrang and Lake Mae. This pattern likely shows a difference in anthropogenic nitrogen (N) loading among the lagoons. The results of this study emphasize the utility of stable isotope measurements to better understand how structural characteristics of aquatic ecosystems (presence or absence of a weir) and anthropogenic disturbances can affect stable isotope patterns in aquatic food webs. This stable isotope approach may be a general technique for evaluating fish habitat and restoration or management of coastal lagoon ecosystems.

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Section: Isotopic Differences In Pond Smelt In Brackish Lagoonsmentioning

confidence: 48%

Habitat-specific variation in stable C and N isotope ratios of pond smelt (Hypomesus nipponensis)

Lee

Choi

Owen

et al. 2013

Animal Cells and Systems

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“…The source values of δ 15 N-NO 3 − and δ 18 O-NO 3 − for NP were measured from the precipitation samples in the watershed (as shown in Table 3 [8,[31][32][33][34][35][36][37][38][39][40]. It was assumed that the fractionation factors equal zero, as denitrification did not occur in surface water in the study area.…”

Section: Evaluation Of Proportional Contributions Of Different Nitratmentioning

confidence: 99%

“…It should be noted that organic nitrogen productions from manure and sewage were much higher in MSW and ZSW as a result of intensive agriculture and livestock feeding activities. Other potential source isotopic values (M & S, NS, NF and NFA) were based on the relevant literature [8,[31][32][33][34][35][36][37][38][39][40], as shown by boxes in Figure 5. It is clear to see nitrate concentrations being affected by the five sources.…”

Section: Nitrate Isotope Characteristics and Qualitative Analysis Of mentioning

confidence: 99%

Using Dual Isotopes and a Bayesian Isotope Mixing Model to Evaluate Nitrate Sources of Surface Water in a Drinking Water Source Watershed, East China

Wang

et al. 2016

Water

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“…Stream flow [12][13][14], flow regime [15], and the river water quality [16,17] can be influenced by the change of land use/land cover in the catchment. Compared with the mechanism of land use effects on the surface water, the groundwater recharge [18,19], discharge [20,21], levels [22], hydrochemistry and contamination [23], and nitrate concentrations [24][25][26][27] can be indirectly affected by the land use changes through infiltration. Krause et al [28] assessed the impacts of different strategies for managing wetland water resources and groundwater dynamics of landscapes based on the analysis of model simulation results of complex scenarios for land-use changes and changes of the density of the drainage-network, but regional groundwater modeling studies are often hampered by data scarcity in space and time especially in semi-arid regions [29].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Groundwater-Surface Water Interactions under Different Land Use Scenarios in the Bulang Catchment, Northwest China

Yang

Zhou

Wenninger

et al. 2015

Water

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Abstract:Groundwater is the most important resource for local society and the ecosystem in the semi-arid Hailiutu River catchment. The catchment water balance was analyzed by considering vegetation types with the Normalized Difference Vegetation Index (NDVI), determining evapotranspiration rates by combining sap flow measurements and NDVI values, recorded precipitation, measured river discharge and groundwater levels from November 2010 to October 2011. A simple water balance computation, a steady state groundwater flow model, and a transient groundwater flow model were used to assess water balance changes under different land use scenarios. It was shown that 91% of the precipitation is consumed by the crops, bushes and trees; only 9% of the annual precipitation becomes net groundwater recharge which maintains a stable stream discharge in observed year. Four land use scenarios were formulated for assessing the impacts of land use changes on the catchment water balance, the river discharge, and groundwater storage in the Bulang catchment. The scenarios are: (1) the quasi natural state of the vegetation covered by desert grasses; (2) the current land use/vegetation types; (3) the change of crop OPEN ACCESSWater 2015, 7 5960 types to dry resistant crops; and (4) the ideal land use covered by dry resistant crops and desert grasses, These four scenarios were simulated and compared with measured data from 2011, which was a dry year. Furthermore, the scenarios (2) and (4) were evaluated under normal and wet conditions for years in 2009 and 2014, respectively. The simulation results show that replacing current vegetation and crop types with dry resistant types can significantly increase net groundwater recharge which leads to the increase of groundwater storage and river discharges. The depleted groundwater storage during the dry year could be restored during the normal and wet years so that groundwater provides a reliable resource to sustain river discharge and the dependent vegetations in the area.

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Impact of land-use types on nitrate concentration and δ15N in unconfined groundwater in rural areas of Korea

Cited by 131 publications

References 31 publications

Habitat-specific variation in stable C and N isotope ratios of pond smelt (Hypomesus nipponensis)

Habitat-specific variation in stable C and N isotope ratios of pond smelt (Hypomesus nipponensis)

Using Dual Isotopes and a Bayesian Isotope Mixing Model to Evaluate Nitrate Sources of Surface Water in a Drinking Water Source Watershed, East China

Simulation of Groundwater-Surface Water Interactions under Different Land Use Scenarios in the Bulang Catchment, Northwest China

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