Seventy years of watershed response to floods and changing forestry practices in western Oregon, USA

Seventy years of watershed response to floods and changing forestry practices in western Oregon, USA
复制标题

美国俄勒冈州西部七十年的流域洪水应对和不断变化的林业实践

DOI:
10.1002/esp.5537
复制
发表时间:
2023
影响因子:
3.3
通讯作者:
Swanson, Frederick J.
Swanson, Frederick J.
中科院分区:
地球科学2区
文献类型:
--
作者:
Goodman, Arianna C.;Segura, Catalina;Jones, Julia A.;Swanson, Frederick J.

文献摘要

参考文献

被引文献

相似文献

本研究考察了俄勒冈州西部64 km 2的Lookout Creek流域70年来的原始森林皆伐和相关道路建设、洪水、山体滑坡、河流中的大量木材和河道变化的历史,该流域的林业实践始于1950年,到20世纪80年代基本停止。流域内具有独特地貌过程的三个区域的响应不同:冰川雕刻区,泥石流为主的区域,泥石流和泥石流为主的区域。流域对洪水的反应更多地与道路建设和砍伐的时机、过去的地貌事件和森林动态有关,而不是与洪水强度有关。即使是小洪水(1-3年)也会在最初的道路建设和伐木时期(1950-1964年)以及大洪水事件之间30年的早期(1966-1995年)持续伐木期间产生地貌反应。1964/65年的洪水,即伐木开始15年后,产生了比记录洪水(1996年)更大的地貌反应,伐木停止十多年后。在上一个时期(1997-2020年),当以前的皆伐是20至70年的森林种植园时,对于有记录以来的第三大事件(2011年),地貌响应可以忽略不计。在五个不同的时间段中的每一个流域的反应取决于在三个区域的前一时期创造的条件。要了解流域对林业的反应,就需要在时间尺度上综合观察林业做法、洪水、山崩的可能性、木材的运送和移动以及河道的变化,以捕捉对过去和目前的管理做法以及地球物理和生物因素和事件的反应。
This study examined the 70‐year history of clearcutting of old‐growth forest and associated road construction, floods, landslides, large wood in rivers, and channel change in the 64 km2Lookout Creek watershed in western Oregon, where forestry practices began in 1950 and largely ceased by the 1980s. Responses differed among three zones with distinctive geomorphic processes within the watershed: a glacially sculpted zone, an earthflow‐dominated zone, and a debris slide and debris flow‐dominated zone. Watershed response to floods was more related to the timing of road construction and clearcuts, past geomorphic events, and forest dynamics than to flood magnitude. Even small (1–3 year) floods generated geomorphic responses in the period of initial road construction and logging (1950–1964) and during ongoing logging in the early part of a 30‐year period between large flood events (1966–1995). The floods of 1964/65, 15 years after the onset of logging, produced much larger geomorphic responses than the flood of record (1996), more than a decade after logging ceased. Geomorphic response was negligible for the third largest event on record (2011) during the last period (1997–2020), when former clearcuts were 20 to 70‐year‐old forest plantations. Watershed response in each of five distinct time periods depended on conditions created during prior periods in the three zones. Understanding of watershed response to forestry requires integrated observation of forestry practices, floods, landslide susceptibility, wood delivery and movement, and channel change on time scales that capture responses to past and ongoing management practices and geophysical and biological factors and events.
DOI: 10.1093/forestscience/53.2.220
发表时间: 2007-04
期刊: Forest Science
影响因子: 1.4
作者:
Paul E. Bigelow;L. Benda;Dave Miller;K. Burnett
通讯作者: Paul E. Bigelow;L. Benda;Dave Miller;K. Burnett
美国太平洋西北地区花旗松/西部铁杉林中火介导的林分发育途径。
DOI: --
发表时间: 2013
期刊: Ecology
影响因子: 4.8
作者:
A. Tepley;F. Swanson;T. Spies
通讯作者: T. Spies
俄勒冈州喀斯喀特西部蓝河流域采伐和道路对河内木材丰度的影响
DOI: --
发表时间: 2003
期刊:
影响因子: --
作者:
N. Czarnomski
通讯作者: N. Czarnomski
DOI: --
发表时间: 2000
期刊:
影响因子: --
作者:
J. M. Faustini
通讯作者: J. M. Faustini
DOI: --
发表时间: 2003
期刊:
影响因子: --
作者:
B. Wemple;J. Jones
通讯作者: J. Jones