Hydroclimatology of the Missouri River Basin
Hydroclimatology of the Missouri River Basin
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密苏里河流域水文气候学
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
J. St
中科院分区：
文献类型：
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作者：
E. Wise;C. Woodhouse;G. McCabe;G. Pederson;J. St
摘要：尽管密苏里河在航运、娱乐、栖息地、水力发电和农业方面具有重要意义，但人们对密苏里河流域的基本水文气候学知之甚少。考虑到过去几十年来发生的干旱和洪水，以及未来气候变化可能加剧这些极端事件，这一点尤其令人担忧。本文利用观测和模拟的水文气候数据以及估算的MRB自然流量记录，评估了MRB流量的主要源区，描述了上游和下游流域的气候控制，以及3)研究了仪器期间的趋势。分析表明，72%的MRB径流是由上游盆地的源头和靠近河口的盆地底部产生的。春季降水和受太平洋纬向和经向气流影响的气温和冬季降水在地表水供应变化中起关键作用。
AbstractDespite the importance of the Missouri River for navigation, recreation, habitat, hydroelectric power, and agriculture, relatively little is known about the basic hydroclimatology of the Missouri River basin (MRB). This is of particular concern given the droughts and floods that have occurred over the past several decades and the potential future exacerbation of these extremes by climate change. Here, observed and modeled hydroclimatic data and estimated natural flow records in the MRB are used to 1) assess the major source regions of MRB flow, 2) describe the climatic controls on streamflow in the upper and lower basins , and 3) investigate trends over the instrumental period. Analyses indicate that 72% of MRB runoff is generated by the headwaters in the upper basin and by the lowest portion of the basin near the mouth. Spring precipitation and temperature and winter precipitation impacted by changes in zonal versus meridional flow from the Pacific Ocean play key roles in surface water supply var...