Influence of change in river basin water environment against habitat environment of aquatic animals in downstream brackish lakes under global warming

全球变暖背景下流域水环境变化对下游咸湖水生动物栖息环境的影响

• 批准号: 20780174
• 负责人: SOMURA Hiroaki
• 金额: $ 2.83万
• 依托单位: Shimane University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20780174/
• 关键词: 水質汚濁; 水環境; 地球温暖化; 施肥量・施肥時期; Soil and Water Assessment Tool; 流域水文量変化; 栄養塩量; 汽水湖塩分濃度; ヤマトシジミ; 浮遊物質量

It was revealed that effluent loads of nitrogen and phosphorus originated from agriculture were larger than those from precipitation, sewages, and livestock in both basins of Hii and Abashiri Rivers. From the results of climate change scenarios by SWAT model, it was estimated that influences of climate change in Abashiri River basin would appear stronger than Hii River basin. Moreover, the magnitudes of salinity dilutions and concentrations predicted under the climate change scenarios would not be lethal for adult clams. However, the egg-laying season of the clam would coincide with periods of strong salinity dilution in the lake. Since juveniles are less tolerant to changes in salinity, future generations of the clam may be affected and reproduction of the clam may be reduced by increasing precipitation in the future.

结果表明，氮和磷的排放负荷来自农业大于降水，污水，牲畜在这两个流域的比伊和网走河。根据SWAT模型的气候变化情景模拟结果，估计网走川流域的气候变化影响要比井川流域强。此外，在气候变化情景下预测的盐度稀释和浓度的大小对成年蛤蜊不会致命。然而，蛤的产卵季节将与湖中强烈的盐度稀释期相吻合。由于幼蚌对盐度变化的耐受性较低，未来几代的蛤蜊可能会受到影响，未来降水量增加可能会减少蛤蜊的繁殖。

项目成果

Sensitivity analyses of hydrologic and suspended sediment discharge in the Abashiri River Basin, Hokkaido Region, Japan

日本北海道地区网走河流域水文和悬浮泥沙排放敏感性分析

• 发表时间: 2009
• 期刊: International Agricultural Engineering Journal 18(1-2)
• 作者: H Somura;I. Takeda;Y. Mori
• 通讯作者: Y. Mori

Estimation of suspended solid discharge to a brackish lake in Shimane prefecture, Japan

日本岛根县咸水湖悬浮固体排放量估算

• 发表时间: 2008
• 作者: 松田怜;大橋(兼子)敬子;H. Somura
• 通讯作者: H. Somura

Impact of climate change on the Hii River basin and salinity in Lake Shinji: a case study using the SWAT model and a regression curve

• DOI: 10.1002/hyp.7321
• 发表时间: 2009-06
• 期刊: Hydrological Processes
• 影响因子: 3.2
• 作者: H. Somura;J. Arnold;D. Hoffman;I. Takeda;Y. Mori;M. Luzio

Application of the SWAT model to the Abashiri River basin for impact assessment analysis to a brackish lake, Hokkaido region, Japan

将 SWAT 模型应用于网走河流域对日本北海道地区咸水湖的影响评估分析

• 发表时间: 2009
• 作者: H.Somura;J.Arnold;D.Hoffman;I.Takeda;Y.Mori;M.Di Luzio;鈴木伸治・田島淳・真田篤史・渡邉文雄・高橋悟・関山哲雄;H. Somura;鈴木伸治・田島淳・真田篤史・渡邉文雄・高橋悟・関山哲雄;H. Somura
• 通讯作者: H. Somura

Numerical analyses on seasonal variations of nutrient salts and load discharges in Abashiri River Basin

网走河流域营养盐和负荷流量季节变化的数值分析

• 发表时间: 2009
• 作者: H.Somura;J.Arnold;D.Hoffman;I.Takeda;Y.Mori;M.Di Luzio;鈴木伸治・田島淳・真田篤史・渡邉文雄・高橋悟・関山哲雄;H. Somura
• 通讯作者: H. Somura