Occurrence characteristics， source apportionment， and ecological risk assessment of pesticides in plateau lakes: a case study of Dianchi Lake

WANG Jialin; ZHOU Lü; CHENG Chen; ZHOU Xun; LI Xinhua; LUO Jingyang; LIU Jianchao

doi:10.13205/j.hjgc.202604001

Volume 44 Issue 4

Apr. 2026

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WANG Jialin, ZHOU Lü, CHENG Chen, ZHOU Xun, LI Xinhua, LUO Jingyang, LIU Jianchao. Occurrence characteristics， source apportionment， and ecological risk assessment of pesticides in plateau lakes: a case study of Dianchi Lake[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(4): 1-10. doi: 10.13205/j.hjgc.202604001

Citation:

WANG Jialin, ZHOU Lü, CHENG Chen, ZHOU Xun, LI Xinhua, LUO Jingyang, LIU Jianchao. Occurrence characteristics， source apportionment， and ecological risk assessment of pesticides in plateau lakes: a case study of Dianchi Lake[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(4): 1-10. doi: 10.13205/j.hjgc.202604001

Citation:

WANG Jialin, ZHOU Lü, CHENG Chen, ZHOU Xun, LI Xinhua, LUO Jingyang, LIU Jianchao. Occurrence characteristics， source apportionment， and ecological risk assessment of pesticides in plateau lakes: a case study of Dianchi Lake[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(4): 1-10. doi: 10.13205/j.hjgc.202604001

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Occurrence characteristics， source apportionment， and ecological risk assessment of pesticides in plateau lakes: a case study of Dianchi Lake

doi: 10.13205/j.hjgc.202604001

1. State Key Laboratory of Water Cycle and Water Security, College of Environment, Hohai University, Nanjing 210098, China;
2. Nanjing Water Supply and Water Conservation Guidance Center, Nanjing 210004, China;
3. Kunming Dianchi and Plateau Lakes Institute, Kunming 650000, China;
4. Suzhou Water Supply Co., Ltd., Suzhou 215002, China;
5. Key Laboratory for Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China

Received Date: 2026-01-30
Available Online: 2026-06-06
Publish Date: 2026-04-01

Abstract

Abstract

This study systematically investigated the occurrence， multi-dimensional spatial distribution， sources， and ecological risks of 160 pesticides in Dianchi Lake， a typical plateau lake impacted by agricultural activities. The results showed that a total of 37 pesticides were detected in the water of Dianchi Lake， with a total concentration range of 64.2 to 1132.8 ng/L （average concentration： 610.0 ng/L）. Fungicides such as boscalid （BOS）， fluopicolide （FPC）， and dimethomorph （DMM） were the dominant compounds. accounting for up to 65.0% of the total concentration. Spatially， concentrations in the southern lake region （672.5 ng/L） were significantly higher than those in the north due to intensive facility agriculture， and highly hydrophobic pesticides （e.g.， penconazole （PEN）） showed a migration trend of enrichment towards the bottom layer. Source apportionment results indicated that inflowing rivers and wastewater treatment plant effluents were the main input sources of pesticides in Dianchi Lake， with average concentrations being 7 and 9 times higher than those in the lake water， respectively. The ecological risk of pesticides to aquatic organisms in Dianchi Lake was ranked as algae > daphnia > fish. Prometryn （PMT） was identified as a high-risk factor for algae， while profenofos （PFF） and carbendazim （CBD） posed potential threats to organisms at higher trophic levels. These findings provide fundamental data and technical support for understanding the occurrence characteristics， source apportionment， and ecological risks of pesticides in typical plateau lake waters.
- plateau lake,
- pesticides,
- spatial distribution,
- source apportionment,
- ecological risk

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References(43)

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