WATER QUALITY RESTORATION IN LAKES AND RESERVOIRS USING NATURAL ENERGY

利用天然能源恢复湖泊和水库的水质

• 批准号: 11450189
• 负责人: KOMATSU Toshimitsu
• 金额: $ 6.02万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450189/
• 关键词: water quality restoration; surface water injection; reservoir; dissolved oxygen; nutrient release; water temperature stratification; 水質改善手法; リン; 窒素; 堆積物

Dissolved oxygen (DO) depletion, which is usually observed in eutrophic lakes and reservoirs, damages natural benthic organisms and enhances nutrient release from the sediment. As a countermeasure aganist these problems, a method which injects surface water including a large amount of DO into the bottom layer, in which DO is often depleted, was proposed. In this study, the water quality restoration in case of continuous or intermittently injection of surface water into hypolimnion was investigated by field experiments performed in an enclosure system which is 100m^2 in area, and in a reservoir which is 15000m^2 in area and 5m in maximum depth. Furthermore, the effect of this system on sediment quality restoration was also investigated by a laboratory experiment.Field experimental results revealed that this system suppressed nutrient and dissolved metals release from the sediment even when DO was depleted by sediment oxygen demand (SOD). Laboratory experimental results also revealed that SOD measured after the procedure had smaller values than those measured before the procedure. This might be due to the continuous DO consumption of organinc materials in the sediment during summer in 2000, promoted by continuous injection of surface water. The experimental and observational results indicate that this system is a promising method to restore water and sediment qualities in enclosed water areas.

溶解氧（DO）消耗通常发生在富营养化湖泊和水库中，它会损害自然底栖生物并增加沉积物中养分的释放。作为针对这些问题的对策，提出了将含有大量DO的地表水注入DO经常耗尽的底层的方法。本研究通过在面积为100m^2的围护系统和面积为15000m^2的水库中进行现场实验，研究了连续或间歇地向低层水注入地表水时的水质恢复情况。最大深度5m。此外，还通过实验室实验研究了该系统对沉积物质量恢复的影响。现场实验结果表明，即使当沉积物需氧量（SOD）耗尽DO时，该系统也能抑制沉积物中养分和溶解金属的释放。实验室实验结果还显示，手术后测量的SOD值比手术前测量的值小。这可能是由于2000年夏季，在地表水的持续注入的推动下，沉积物中的有机物质不断消耗DO。实验和观测结果表明，该系统是恢复封闭水域水和沉积物质量的一种有前途的方法。

项目成果

小松利光 他6名: "底層への間欠的な表層水供給による水質改善効果の検討"水工学論文集. 44. 1113-1118 (2000)

小松俊光等6人：“地表水向底层间歇供给的水质改善效果研究”水利学报44. 1113-1118(2000)。

T.Komatsu, T.Okada, Y.Nakamura, S.Nakashima, T.Hasebe, K.Fujita, Y.Iseri: "Water quality restoration by injecting surface water into hypolimnion in enclosed water area."Proc.of Coastal Engineering, JSCE. 46. 1111-1115 (1999)

T.Komatsu、T.Okada、Y.Nakamura、S.Nakashima、T.Hasebe、K.Fujita、Y.Iseri：“通过将地表水注入封闭水域的低层水来恢复水质。”Proc.of Coastal Engineering，

小松利光 他6名: "表層水底層部連続供給による水質底泥改善技術"海岸工学論文集. 47. 1156-1160 (2000)

Toshimitsu Komatsu等6人：“通过持续供应地表水和底层来改善水质和底部污泥的技术”海岸工程论文47。1156-1160（2000）。

小松利光: "底層への間欠的な表層水供給による水質改善効果の検討"水工学論文集. 第44巻. 1113-1118 (2000)

小松敏光：“向底层间歇性地表供水的水质改善效果的检验”水利工程学报第44卷1113-1118（2000）。

T.Komatsu, T.Inoue, T.Hasebe, M.Nishimoto, K.Fujita, Y.Iseri, S.Nakshima: "Water and sediment quality restoration by continuous injection of surface water into hypolimnion."Proc.of Coastal Engineering, JSCE. 47. 1156-1160 (2000)

T.Komatsu、T.Inoue、T.Hasebe、M.Nishimoto、K.Fujita、Y.Iseri、S.Nakshima：“通过将地表水连续注入低水层来恢复水和沉积物质量。”Proc.of Coastal Engineering，