Assessment of climate variability and short-term land use land cover change effects on water quality of Cahaba River Basin
Assessment of climate variability and short-term land use land cover change effects on water quality of Cahaba River Basin
复制标题
气候变化和短期土地利用土地覆盖变化对卡哈巴河流域水质影响的评估
DOI：
10.1504/ijhst.2021.10034684
复制
发表时间：
2021
影响因子：
1.8
通讯作者：
M. Anderson
中科院分区：
文献类型：
--
作者：
Pooja P. Preetha;A. Al;M. Anderson
本研究探讨了土地利用、土地覆盖（LULC）变化和气候变率对阿拉巴马州卡哈巴河流域水质的短期影响。利用水土资源评价工具（SWAT）与时空分析相结合，评价了土壤水分变化优势模式对土壤产沙量和养分负荷变化的贡献。仅考虑LULC变化的优化热点分析表明，在城市发展取代森林和农业用地的上游Cahaba流域，产沙量和养分负荷减少。气候和LULC分别使年产沙量和磷负荷提高2.8%和61%，使氮负荷降低17%。气候和土地利用的综合变化对未来水质的影响更大。本研究结果将为今后卡哈巴河流域的水土管理提供有益的信息。
This study examines the short-term impacts of land use land cover (LULC) changes as well as climate variability on the water quality of the Cahaba River watershed in Alabama. The Soil and Water Assessment Tool (SWAT), in combination with spatial-temporal analysis were applied for evaluating contributions of dominant LULC patterns on changes in the sediment yields and nutrient loads. Optimised hot spot analysis with LULC change alone showed decreases in sediment yield and nutrient loads in the upper Cahaba watershed where forests and agricultural lands were replaced by urban development. Climate and LULC raised annual sediment yield and phosphorus load by 2.8% and 61% respectively and lowered nitrogen load by 17%. The combined changes in climate and land use posed a stronger impact on water quality in future. The findings of this study will provide useful information for future water and land management in the Cahaba River Basin.