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| DOI | 10.1353/sgo.2024.a920706 |
| Spatial and Temporal Characteristics of Channel Disturbance Zones in Big River, Southeast Missouri (1937-2018) | |
| 发表日期 | 2024 |
| ISSN | 0038-366X |
| EISSN | 1549-6929 |
| 起始页码 | 64 |
| 结束页码 | 1 |
| 卷号 | 64期号:1 |
| 英文摘要 | Ozarks watersheds have responded to land clearing and settlement disturbances by transporting large amounts of gravel and sediment to main valleys of medium -large river systems. Historical gravel and sediment accumulate in disturbance zones, which are areas of excessive channel activity that can be detected over time using historical aerial photographs. This project uses a series of aerial photos from 1937-2018 to identify disturbance zones in the Big River of southeast Missouri, which has a history of lead mining and ore processing that has caused widespread contamination of the channel and floodplain deposits. Variations in active areas of the historical meander belt show that disturbance zones account for 24 percent of the channel length at an interval of one per 2.5 km of channel. Megabars and extensions are the most prominent types of disturbance zones, but translations and cutoffs are larger with higher potential for sediment storage. From 1937 to 1976, areas of channel activity have cycled between expansion and contraction. However, after a period of recovery prior to 1976, disturbance zone areas have been expanding over the last 40 years likely in response to an increase in flood magnitude and frequency from more high intensity rainfall events since 1973. |
| 英文关键词 | historical channel change; aerial photo analysis; climate change |
| 语种 | 英语 |
| WOS研究方向 | Geography |
| WOS类目 | Geography |
| WOS记录号 | WOS:001206879900004 |
| 来源期刊 | SOUTHEASTERN GEOGRAPHER
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/296305 |
| 作者单位 | Missouri State University; Missouri State University; University of North Carolina; Appalachian State University |
| 推荐引用方式 GB/T 7714 | . Spatial and Temporal Characteristics of Channel Disturbance Zones in Big River, Southeast Missouri (1937-2018)[J],2024,64(1). |
| APA | (2024).Spatial and Temporal Characteristics of Channel Disturbance Zones in Big River, Southeast Missouri (1937-2018).SOUTHEASTERN GEOGRAPHER,64(1). |
| MLA | "Spatial and Temporal Characteristics of Channel Disturbance Zones in Big River, Southeast Missouri (1937-2018)".SOUTHEASTERN GEOGRAPHER 64.1(2024). |
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