纸质出版:2024
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梁兰唯, 孙雯雯, 王倩, 等. 云南昭通渔洞水库枯水期水质及其变化特征[J]. 环境科学与技术, 2024,47(S1):198-206.
梁兰唯, 孙雯雯, 王倩, et al. Characteristics and Variation of Water Quality During Dry Season in Yudong Reservoir of Zhaotong District in Yunnan Province[J]. 2024, 47(S1): 198-206.
梁兰唯, 孙雯雯, 王倩, 等. 云南昭通渔洞水库枯水期水质及其变化特征[J]. 环境科学与技术, 2024,47(S1):198-206. DOI: 10.19672/j.cnki.1003-6504.0838.23.338.
梁兰唯, 孙雯雯, 王倩, et al. Characteristics and Variation of Water Quality During Dry Season in Yudong Reservoir of Zhaotong District in Yunnan Province[J]. 2024, 47(S1): 198-206. DOI: 10.19672/j.cnki.1003-6504.0838.23.338.
云南昭通渔洞水库集城市供水、农业灌溉、防洪、发电、渔业等功能,了解其枯水期水质及变化对指导水力调度,保障水库水质和水量稳定具有重要的科学意义。该文通过在库区不同水域布设30个监测点,在1月和5月对水库表层、中层和底层水样进行采集,分析了水质主要理化参数和营养物浓度,并利用综合指数法对水质进行了评价。结果表明:从1月到5月,水库水温、电导率和pH显著升高(P0.05),但表层水透明度显著地下降(P0.05)。平均COD从(8.21±3.10) mg/L降至(7.68±2.26) mg/L。水域和水层不同,COD各异,但总体上差异不明显(P0.05)。1月份水库平均TN为(2.65±0.35) mg/L,其中NO_3~--N占约90%
NH_3-N仅1.5%,平均值则主库区显著低于库湾(P0.05);而到了5月份,平均TN为(0.96±0.12) mg/L
NO_3~--N占约74%
NH_3-N仅6.7%,且底层显著高于表层(P0.05)。水库TDP和SRP在1月份分别为(4.92±1.36)μg/L和(2.25±1.89)μg/L,且水域不同,它们的含量各异;到了5月份,则分别上升至(11.6±11.0)μg/L和(6.72±9.38)μg/L。综合指数评价结果说明,渔洞水库在1月为Ⅲ类水质,但到了5月上升至Ⅱ类,表明渔洞水库在枯水期具有较强的自净能力。枯水期渔洞水库的自净能力可能与硅藻生长有关。水柱中溶解硅较高,水温升高利于硅藻生长,从而消耗了水柱中的NO_3~--N和溶解硅,水质得到了提升。
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