Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2017WR021903 |
Drainage from the Critical Zone: Lithologic Controls on the Persistence and Spatial Extent of Wetted Channels during the Summer Dry Season | |
Lovill, S. M.; Hahm, W. J.; Dietrich, W. E. | |
2018-08-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:8页码:5702-5726 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | In seasonally dry environments, critical zone drainage provides base flow that sustains river ecosystems. The extent of wetted channels and magnitude of base flow throughout the network, however, are rarely documented, and no general theory currently exists enabling the prediction of these key ecosystem properties. We conducted channel surveys in early and late summers of 2012, 2014, and 2015 in four headwater drainage networks (2.8-17.0 km(2), in the Franciscan Formation of the Eel River (Northern California)), two of which are underlain by the Coastal Belt (argillite and inter-bedded sandstone) and two of which are underlain by the Central Belt (sheared argillaceous-matrix, meta-sedimentary melange). In all networks, stationary springs controlled the extent of flow. Though surveyed during a period of multiyear drought, the two adjacent Coastal Belt networks remained flowing throughout late-summer months, sustained by drainage from groundwater stored in thick weathered bedrock above fresh, impermeable bedrock. Flow magnitudes, however, decreased and surface flows became increasingly discontinuous, largely due to infiltration into thick gravel deposits on the channel bed. Only 23 km away, in the Central Belt melange, channel flow ceased early in the summer because the thin critical zone (typically <3 m) stored little water. All late-summer flowing water initiated from deep-rooted sandstone blocks and terminated a short distance downslope. Our findings suggest that lithology and critical zone development exert primary controls on wetted channel extent. Given similar annual precipitation, nearby watersheds can have dramatically different summer wetted channel networks that result in fundamentally different aquatic ecosystems. |
英文关键词 | base flow wetted channels critical zone drainage networks channel head channel network |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445451800031 |
WOS关键词 | MENDOCINO TRIPLE JUNCTION ; STRATH TERRACE FORMATION ; NORTHERN CALIFORNIA ; GROUNDWATER-FLOW ; STREAM NETWORKS ; DEBRIS FLOWS ; FRANCISCAN MELANGE ; WATER STORAGE ; RIVER-BASIN ; BEDROCK |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21848 |
专题 | 资源环境科学 |
作者单位 | Univ Calif Berkeley, Earth & Planetary Sci, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | Lovill, S. M.,Hahm, W. J.,Dietrich, W. E.. Drainage from the Critical Zone: Lithologic Controls on the Persistence and Spatial Extent of Wetted Channels during the Summer Dry Season[J]. WATER RESOURCES RESEARCH,2018,54(8):5702-5726. |
APA | Lovill, S. M.,Hahm, W. J.,&Dietrich, W. E..(2018).Drainage from the Critical Zone: Lithologic Controls on the Persistence and Spatial Extent of Wetted Channels during the Summer Dry Season.WATER RESOURCES RESEARCH,54(8),5702-5726. |
MLA | Lovill, S. M.,et al."Drainage from the Critical Zone: Lithologic Controls on the Persistence and Spatial Extent of Wetted Channels during the Summer Dry Season".WATER RESOURCES RESEARCH 54.8(2018):5702-5726. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论