Natural and anthropogenic factors affecting the groundwater quality in the Nandong karst underground river system in Yunan, China

Jiang, Yongjun; Wu, Yuexia; Groves, Chris; Yuan, Daoxian; Kambesis, Pat

doi:10.1016/j.jconhyd.2009.08.001

Cited by 233 publications

(119 citation statements)

References 26 publications

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“…High rates of evapo-transpiration within urban green spaces and agricultural lands facilitate the salinization phenomenon, and excess irrigation water eases the consequent percolation into aquifers. Similar justifications have been reported as the main reason of groundwater salinization in arid and semi-arid urban areas (Rodvang and Simpkins 2001;Oren et al 2004;Jiang et al 2009). Climatic conditions have the potential to adversely affect the groundwater quality from another point of view.…”

Section: Resultssupporting

confidence: 83%

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Groundwater quality degradation of urban areas (case study: Tehran city, Iran)

Nasrabadi

Maedeh

2013

Int. J. Environ. Sci. Technol.

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Groundwater quality of Tehran city is considered in this study. Nine sampling stations were selected, and composite sampling campaign was performed in summer 2012. Groundwater sampled from northern stations appeared to have acceptable characteristics for agricultural and drinking uses. The southern station samples did not meet the required guidelines. Concentration of SO 4 2-, Na ? and Cl -obey a sharp ascending trend southwards. Accordingly, the electrical conductivity of the last station at the very southern areas is more than fifteen times greater than that of the first northern station. Tehran city is located in a semi-arid climate and experiences long hot summers. High rates of evapo-transpiration within urban green spaces and agricultural lands facilitate the salinization phenomenon in root zones. As a result, excess irrigation water eases the consequent percolation into aquifers. Furthermore, saline water intrusion from salt marshes located down south of the city is an expected consequence of wells overpumping. Such case is especially remarkable in hot seasons when an increased urban water demand is observed. Remarkable sulfate concentrations in saline water are mainly justified by percolation of sulfate containing fertilizers which are broadly used by local farmers in an uncontrolled manner. Surface run-offs and municipal wastewater leakage may also trigger the salinization process.

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Section: Resultssupporting

confidence: 83%

“…in groundwater samples. Lithological heterogeneities along with anthropogenic pollution sources may be addressed as the main factors determining the dominant hydrochemical compounds in aquifers (Jiang et al 2009). Rather than one unique distinguished dominant type, a variety of types is observed in different stations.…”

Section: Resultsmentioning

confidence: 99%

Groundwater quality degradation of urban areas (case study: Tehran city, Iran)

Nasrabadi

Maedeh

2013

Int. J. Environ. Sci. Technol.

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“…Equation (5), usually considered as an expression for the natural weathering process of carbonate, is an important reaction in understanding the kinetics of carbonate dissolution in carbonate-dominated areas, where the molar ratio of HCO − 3 and Me 2+ in the river is usually used as an indicator to make estimates of CO 2 consumption by carbonate weathering on the regional/global scale (Hagedorn and Cartwright, 2009;Li et al, 2009). In agricultural areas, the relationship between (Ca + Mg)/HCO − 3 and NO − 3 is usually employed to estimate the contribution of N fertilizer to riverine Ca 2+ , Mg 2+ and alkalinity (Etchanchu and Probst, 1988;Jiang, 2013;Jiang et al, 2009;Perrin et al, 2008;Semhi and Suchet, 2000). In these studies, the nitrification 2 -NH 4 NO 3 ; 3 -NH 4 HCO 3 ; 4 -NaNO 3 ; 5 -NH 4 Cl; 6 -(NH 4 ) 2 CO 3 ; 7 -Ca 3 (PO 4 ) 2 ; 8 -(NH 4 ) 3 PO 4 ; 9 -Ca-Mg-P; 10 -urea; 11 -K 2 CO 3 .…”

Section: Difference Between Nhmentioning

confidence: 99%

Impact of different fertilizers on carbonate weathering in a typical karst area, Southwest China: a field column experiment

et al. 2017

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Abstract. Carbonate weathering, as a significant vector for the movement of carbon both between and within ecosystems, is strongly influenced by agricultural fertilization, since the addition of fertilizers tends to change the chemical characteristics of soil such as the pH. Different fertilizers may exert a different impact on carbonate weathering, but these discrepancies are as yet not well-known. In this study, a field column experiment was conducted to explore the response of carbonate weathering to the addition of different fertilizers. We compared 11 different treatments, including a control treatment, using three replicates per treatment. Carbonate weathering was assessed by measuring the weight loss of limestone and dolostone tablets buried at the bottom of soil-filled columns. The results show that the addition of urea, NH 4 NO 3 , NH 4 HCO 3 , NH 4 Cl and (NH 4 ) 2 CO 3 distinctly increased carbonate weathering, which was attributed to the nitrification of NH + 4 . The addition of Ca 3 (PO 4 ) 2 , Ca-Mg-P and K 2 CO 3 induced carbonate precipitation due to the common ion effect. The addition of (NH 4 ) 3 PO 4 and NaNO 3 had a relatively small impact on carbonate weathering in comparison to those five NH 4 -based fertilizers above. The results of NaNO 3 treatment raise a new question: the negligible impact of nitrate on carbonate weathering may result in an overestimation of the impact of N fertilizer on CO 2 consumption by carbonate weathering on the regional/global scale if the effects of NO 3 and NH 4 are not distinguished.

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“…Přesto některé z obcí vykazují relativně nízký podíl obyvatel napojených na kanalizace a ČOV nebo vůbec obecní ČOV nedisponují Hübelová a kol., 2016). Deforestace v krasovém prostředí často vede ke zvýšení erozních aktivit, které následně vedou k nárůstu kontaminace povrchových vod v krasových oblastech organickými látkami způsobujícími eutrofizaci vody (Jiang et al, 2009;van Beynen a Bialkowska-Jelinska, 2012;Hillebrand et al, 2015).…”

Section: Obyvatelstvo Lidská čInnost Sídla a Technická Infrastruktuunclassified

Development of Population and Technical Infrastructure in Municipalities of the Moravian Karst: Potential Influence on the Organic Pollution of Water

Hübelová¹,

Pavlík²

2016

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Water plays a key role in formation of the karstic regions. Due Keywords: demography, population density, human activities, epidemiology ÚvodChráněná krajinná oblast (CHKO) Moravský kras (MK) je unikátním krasovým prostorem. V důsledku geologických poměrů, klimatických a hydrologických podmínek se v tomto území vytvořil rozvinutý krasový reliéf. Typologicky se jedná o holokarst, tj. úplný kras se značným rozvojem povrchového i podzemního krasového fenoménu (Správa CHKO MK, 2016). Na utváření krasového prostředí se významnou měrou podílela voda. Ta hrála i v MK důležitou roli při rozvoji železářské výroby, populačním růstu obyvatel a vzniku sídel (Absolon, 1970).Organické znečištění vody, protékající povodím MK bylo popisováno již od 17. stol. Ze všech těchto uchovaných informací vyplývá, že vodní prostředí MK bylo hojně organicky znečištěno. Lze předpokládat, že toto znečištění souviselo především s lidskou činností (těžba nerostných surovin, odlesňováním a zemědělskou činností). Vyvstává proto otázka, jaké jsou hlavní zdroje organického znečištění vody (povrchové a krasové) v současné době a jak k němu přispívá činnost lidí a rozsah urbanizovaného území. Z předešlých ekologických studií prováděných v rámci sledování environmentálních a podmíněně patogenních

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Natural and anthropogenic factors affecting the groundwater quality in the Nandong karst underground river system in Yunan, China

Cited by 233 publications

References 26 publications

Groundwater quality degradation of urban areas (case study: Tehran city, Iran)

Groundwater quality degradation of urban areas (case study: Tehran city, Iran)

Impact of different fertilizers on carbonate weathering in a typical karst area, Southwest China: a field column experiment

Development of Population and Technical Infrastructure in Municipalities of the Moravian Karst: Potential Influence on the Organic Pollution of Water

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