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博斯腾湖水质年内时空特征及其驱动因素分析
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Abstract:
湖泊在干旱区水资源中发挥着重要的作用，而水质恶化是湖泊水资源开发利用的重大威胁之一。本研究以我国最大的内陆淡水湖——博斯腾湖为例，分析了湖泊年内水质时空变化特征，并探讨了其驱动因素。研究结果表明：博斯腾湖的主要污染物是TDS，COD和TP，且TDS年内空间分布上呈现出西南低、东北高的趋势，COD在空间上四月和六月表现为西南低、东北高，在八月和十月表现为西南高、东北低，TP在空间上四月表现为西南低、东北高，在十月表现为西南高、东北低；NH3-N含量较低，且空间分布均匀，不是威胁博斯腾湖水质的主要因素。博斯腾湖水质存在显著年内分布差异，六月和八月水体TDS和COD含量较高而TP含量较低，四月和十月TDS和COD含量较低而TP含量较高。相较于外源污染物，长期滞留湖区的内源污染物对博斯腾湖年内水质变化的影响更显著，而温度是加剧博斯腾湖水质年内差异的主要催化剂。因此，通过调节年内不同温度时段下的湖泊水位，可以有效调控博斯腾湖年内水质状况。
Lakes in the arid and semi-arid regions play a critical role in valuable water resources, while deterioration in water quality would threaten the societies, economies, biological diversity and fragile environment conservation in these areas. In this study, 68 monitoring points around the Bosten Lake, the largest inland freshwater lake in China, were established to investigate the spatial-temporal variation of water quality during the year. The results showed that the main pollutants of the lake were total dissolved solids (TDS), chemical oxygen demand (COD), and total phosphorus (TP), moreover, TDS content in the southwestern part of lake was generally lower than that in the eastern and northern part of lake; COD content in the southwestern part of lake was generally lower than that in the eastern and northern part of lake in April and June, but it in southwestern part of lake was generally higher than that in the eastern and northern part of lake in August and October; TP content in the southwestern part of lake was generally lower than that in the eastern and northern part of lake in April, but it in southwestern part of lake was generally higher than that in the eastern and northern part of lake in October. NH3-N content, which was evenly distributed in the lake area, was not the main contaminant in the Lake. Water quality in the Lake also showed a temporal distribution difference. The TDS content of the lake in June and August was higher than that in April and October, while the COD and TP contents were opposite to the TDS content. Allochthonous pollutants composed by the wastewater from agricultural irrigations and inflow from the rivers affected the spatial-temporal water quality, but this effect was not significant. Endogenous pollutants constituted the key reason for the spatial difference, and the solubility change of endogenous and exogenous pollutants caused by temperature mainly determined the annual change of water quality. The water quality of Bosten Lake could be improved by adjusting the water level of the lake in different temperature periods annually.
| [1] | ZHANG, L., SHEN, T., CHENG, Y., et al. Temporal and spatial variations in the bacterial community composition in Lake Bosten, a large, brackish lake in China. Scientific Reports, 2020, 10: Article No. 304.
https://doi.org/10.1038/s41598-019-57238-5 |
| [2] | ZHOU, H., CHEN, Y., PERRY, L., et al. Implications of climate change for water management of an arid inland lake in Northwest China. Lakeand Reservoir Management, 2015, 31: 202-213. https://doi.org/10.1080/10402381.2015.1062834 |
| [3] | CARDONA, A., CARRILLO, R. and HUIZAR, A. Salinization in coastal aquifers of arid zones: An example from Santo Domingo, Baja California Sur, Mexico. Environmental Geology, 2004, 45(3): 350-366.
https://doi.org/10.1007/s00254-003-0874-2 |
| [4] | YAO, J., CHEN, Y., ZHAO, Y., et al. Hydroclimatic changes of Lake Bosten in northwest China during the last decades. Scientific Reports, 2018, 8: Article No. 9118. https://doi.org/10.1038/s41598-018-27466-2 |
| [5] | HUO, S., MA, C. and XI, B. Establishing water quality reference conditions for nutrients, chlorophyll a and Secchi depth for 7 typical lakes in arid and semiarid ecoregion, China. Environmental Earth Sciences, 2015, 73(8): 4739-4748.
https://doi.org/10.1007/s12665-014-3760-1 |
| [6] | MA, L., WU, J., LIU, W., et al. Distinguishing between anthropogenic and climatic impacts on lake size: A modeling approach using data from Ebinur Lake in arid northwest China. Journal of Limnology, 2014, 73: 148-155.
https://doi.org/10.4081/jlimnol.2014.852 |
| [7] | 王丽艳, 李畅游, 孙标. 基于MODIS数据遥感反演呼伦湖水体总磷浓度及富营养化状态评价. 环境工程学报, 2014, 12(8): 5527-5534.
WANG Liyan, LI Changyou and SUN Biao. Determination total phosphorus concentration and evaluation eutrophication of Hulun Lake with MODIS data. Chinese Journal of Environmental Engineering, 2014, 12(8): 5527-5534. (in Chinese) |
| [8] | LIU, H., YIN, Y. and PIAN, S. Disappearing lakes in semiarid northern China: Drivers and environmental impact. Environmental Science & Technology, 2013, 47(21): 12107-12114. https://doi.org/10.1021/es305298q |
| [9] | MA, L., ABUSUWAILI, J. and LIU, W. Environmentally sensitive grain size component records and its response to climatic and anthropogenic influences in Bosten Lake region, China. Scientific Reports, 2020, 10: Article No. 942.
https://doi.org/10.1038/s41598-020-57921-y |
| [10] | RUSULI, Y., LI, L., AHMAD, S., et al. Dynamics model to simulate water and salt balance of Bosten Lake in Xinjiang, China. Environmental Earth Sciences, 2015, 74: 2499-2510. https://doi.org/10.1007/s12665-015-4257-2 |
| [11] | TANG, X., XIE, G. and SHAO, K. Influence of salinity on the bacterial community composition in Lake Bosten, a large oligohaline lake in arid northwestern China. Applied & Environmental Microbiology, 2012, 78(13): 4748-4751.
https://doi.org/10.1128/AEM.07806-11 |
| [12] | 赛巴雅尔图, 陈敏鹏, 冯丽. 博斯腾湖流域农业面源污染现状分析[J]. 水资源保护, 2012, 28(2): 25-29.
SAI Bayaertu, CHEN Minpeng and FENG Li. Agricultural non-point source pollution of Bosten Lake basin. Water Resources Protection, 2012, 28(2): 25-29. (in Chinese) |
| [13] | 赛巴雅尔图, 黄瑾, 谢贵娟, 等. 新疆博斯腾湖浮游细菌丰度对富营养化及咸化响应[J]. 湖泊科学, 2011, 23(6): 934-941.
SAI Bayaertu, HUANG Jin, XIE Guijuan, et al. Response of planktonic bacterial abundance to eutrophication and salinization in Lake Bosten, Xinjiang. Journal of Lake Sciences, 2011, 23(6): 934-941. (in Chinese) |
| [14] | MISCHKE, S., WUNEMANN, B. The Holocene salinity history of Bosten Lake (Xinjiang, China) inferred from ostracod species assemblages and shell chemistry: Possible paleoclimatic implications. Quaternary International, 2006, 154: 100-112.
https://doi.org/10.1016/j.quaint.2006.02.014 |
| [15] | 吴敬禄, 马龙, 曾海鳌. 新疆博斯腾湖水质水量及其盐化特征分析[J]. 地理科学, 2013, 33(2): 231-237.
WU Jinglu, MA Long and ZENG Haiao. Water quality and quantity characteristics and its evolution in Lake Bosten, Xinjiang over the past 50 years. Scientia Geographica Sinica, 2013, 33(2): 231-237. (in Chinese) |
| [16] | ZUO, Q., DOU, M., CHEN, X. I., et al. Physically-based model for studying the salinization of Bosten Lake in China. Hydrological Sciences Journal, 2006, 51(3): 432-449. |
| [17] | 于志同, 李广宇, 张恩楼, 等. 1860年以来博斯腾湖碳沉积过程演变[J]. 湖泊科学, 2019, 31(1): 293-304.
YU Zhitong, LI Gonglong, ZHANG Enlou, et al. Process variations of sedimentary carbon accumulation in Lake Bosten since 1860. Journal of Lake Sciences, 2019, 31(1): 293-304. (in Chinese) |
| [18] | 周洪华, 李卫红, 陈亚宁, 等. 博斯腾湖水盐动态变化(1951-2011年)及对气候变化的响应[J]. 湖泊科学, 2014, 26(1): 55-65.
ZHOU Honghua, LI Weihong, CHEN Yaning, et al. Water-salt succession patterns (1951-2011) and its response to climate change in Lake Bosten. Journal of Lake Sciences, 2014, 26(1): 55-65. (in Chinese) |
| [19] | 谢归娟, 张建平, 杨祥明, 等. 博斯腾湖水质现状(2010-2011年)及近50年来演变趋势[J]. 湖泊科学, 2013, 23(6): 837-846.
XIE Guijuan, ZHANG Jianping, TANG Xiangming, et al. Spatio-temporal heterogeneity of water quality (2010-2011) and succession patterns in Lake Bosten during the past 50 years. Journal of Lake Sciences, 2013, 23(6): 837-846. (in Chi-nese) |
| [20] | LIU, Y., MU, S., BAO, A., et al. Effects of salinity and (an)ions on arsenic behavior in sediment of Bosten Lake, Northwest China. Environmental Earth Sciences, 2015, 73(8): 4707-4716. https://doi.org/10.1007/s12665-014-3755-y |
| [21] | LI, W. H., FU, A. H., ZHOU, H. H., et al. Analysis of trends and changes in the water environment of an inland river basin in an Arid Area. Water Environment Research, 2014, 86(2): 104-110. https://doi.org/10.2175/106143013X13807328849017 |
| [22] | WUNNEMANN, B., MISCHKE, S. and CHEN, F. A Holocene sedimentary record from Bosten Lake, China. Palaeogeography, Palaeoclimatology, Palaeoecology, 2006, 234(2): 223-238. https://doi.org/10.1016/j.palaeo.2005.10.016 |
| [23] | 孙占东, 王润. 气候背景下冰川在博斯腾湖水量平衡中的作用[J]. 湖泊科学, 2006, 18(5): 484-489.
SUN Zhandong, WANG Run. Effect of glaciers change to water balance of Bosten Lake under climatic backgrounds. Journal of Lake Sciences, 2006, 18(5): 484-489. (in Chinese) |
| [24] | GUO, M., WU, W., ZHOU, X., et al. Investigation of the dramatic changes in lake level of the Bosten Lake in northwestern China. Theoretical and Applied Climatology, 2015, 119: 341-351. https://doi.org/10.1007/s00704-014-1126-y |
| [25] | ISLAM, M. A., BEARDALL, J. and COOK, P. Intra-strain variability in the effects of temperature on UV-B sensitivity of cyanobacteria. Photochemistry and Photobiology, 2018, 95(1): 306-314. https://doi.org/10.1111/php.13014 |
| [26] | THOMAS, M. K., LITCHMAN, E. Effects of temperature and nitrogen availability on the growth of invasive and native cyanobacteria. Hydrobiologia, 2016, 763(1): 357-369. https://doi.org/10.1007/s10750-015-2390-2 |
| [27] | XIAO, F, LING, F., DU, Y., et al. Evaluation of spatial-temporal dy-namics in surface water temperature of Qinghai Lake from 2001 to 2010 by using MODIS data. Journal of Arid Land, 2013, 5(4): 452-464. https://doi.org/10.1007/s40333-013-0188-5 |
| [28] | CAO, H., TAO, Y., KONG, F., et al. Relationship be-tween temperature and cyanobacterial recruitment from sediments in laboratory and field studies. Journal of Freshwater Ecology, 2008, 23(3): 405-412.
https://doi.org/10.1080/02705060.2008.9664217 |
