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.

研究表明，在日井川和网走川流域，农业排放的氮和磷排放量均高于降水、污水和牲畜排放量。根据SWAT模型的气候变化情景结果，预计气候变化对网走河流域的影响将强于日井河流域。此外，在气候变化情景下预测的盐度稀释和盐度浓度对于成年蛤来说不会致命。然而，蛤的产卵季节恰逢湖中盐度严重稀释的时期。由于幼体对盐度变化的耐受性较差，蛤的后代可能会受到影响，并且未来降水量的增加可能会减少蛤的繁殖。

项目成果

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: Hiroaki Somura(宗村広昭)

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

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

气候变化对日井河流域和宍道湖盐度的影响：使用 SWAT 模型和回归曲线的案例研究

• 发表时间: 2009
• 作者: H. Somura; J. Arnold; D. Hoffman; I. Takeda; Y. Mori; M. Di Luzio
• 通讯作者: M. Di Luzio

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: H. Somura

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
• 作者: H Somura; I. Takeda; Y. Mori
• 通讯作者: Y. Mori