State-shifting at the edge of resilience: River suspended sediment responses to land use change and extreme storms
State-shifting at the edge of resilience: River suspended sediment responses to land use change and extreme storms
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恢复能力边缘的状态转变：河流悬浮沉积物对土地利用变化和极端风暴的响应
DOI：
10.1016/j.geomorph.2017.09.004
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发表时间：
2018
期刊：
影响因子：
3.9
通讯作者：
Dymond, John R.
中科院分区：
文献类型：
--
作者：
Abbott, Samantha;Julian, Jason P.;Kamarinas, Ioannis;Meitzen, Kimberly M.;Fuller, Ian C.;McColl, Samuel T.;Dymond, John R.
气候、地貌和土地利用的相互作用决定了流域泥沙的产生和相关的河流泥沙负荷。因此，集水区对扰动的恢复力可以用悬浮泥沙状况来评估。这个案例研究在新西兰北岛南部的丘陵地区，是一个为期十年的检查的短期和长期影响的极端风暴事件对沉积物的供应和消耗的Oroua和Pohangina集水区，两个集水区，经历了激烈的土地利用变化和频繁的大规模滑坡。水文蚀变指标，一个程序开发，以表征水文制度，被用来分析每日悬浮泥沙记录在一个为期十年的Oroua和Pohangina的沉积物制度的特点。对记录期间的含沙事件的汇总数据集进行了分析，以检查单个风暴相对于径流量的悬浮泥沙响应。这项研究的结果表明，产生极端滑坡和洪水的大风暴有能力产生足够的沉积物，暂时将集水区从供应有限状态转换为运输有限状态。在陡峭的山坡上放牧的地方，滑坡和沉积物供应不成比例地高。以前的风暴的时间和强度，或先行集水条件，也被证明会影响集水的反应。在这两个集水区，悬浮泥沙负荷升高了一段时间的滑坡产生2004年2月风暴后的4年。我们提出的方法和研究结果是有用的集水区暴露于频繁的干扰，如土地利用变化和山体滑坡的恢复力进行评估。
The interaction of climate, geomorphology, and land use dictates catchment sediment production and associated river sediment loads. Accordingly, the resilience of catchments to disturbances can be assessed with suspended sediment regimes. This case study in the hill country of the lower North Island of New Zealand was a decade-long examination of the short- and long-term effects of an extreme storm event on sediment supply and exhaustion in the Oroua and Pohangina catchments, two catchments that have experienced intense land use changes and frequent broad-scale landslides. Indicators of Hydrologic Alteration, a program developed to characterize hydrologic regimes, was used to analyze daily suspended sediment records over a period of a decade in order to characterize sediment regimes of the Oroua and Pohangina. An aggregated data set of sediment-bearing events for the period of record was analyzed to examine the suspended sediment response of individual storms relative to runoff magnitudes. The findings of this study demonstrate that large storms that generate extreme landsliding and flooding have the ability to produce enough sediment to temporarily convert catchments from a supply-limited state to a transport-limited state. Landsliding and thus sediment supply was disproportionately high in locations where livestock grazing occurred on steep hillslopes. The timing and intensity of previous storms, or the antecedent catchment condition, was also shown to influence the response of the catchments. In both catchments, suspended sediment loads were elevated for a period of ~ 4 years following the landslide-generating February 2004 storm. The methods and findings we present are useful for assessing the resilience of catchments exposed to frequent disturbances such as land use changes and landslides.
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德克萨斯丘陵地区中心地带的灾难性洪水扰动以及社区对植物恢复能力的反应
影响因子：
3.9
作者：
Meitzen, Kimberly M.;Phillips, John N.;Perkins, Thaïs;Manning, Aspen;Julian, Jason P.
通讯作者：
Julian, Jason P.
新西兰怀拉拉帕可侵蚀粉砂岩丘陵地区的牧场生产和土壤特性在土壤滑痕上的恢复
影响因子：
1.8
作者：
B. Rosser;C. Ross
通讯作者：
C. Ross
新西兰莫图伊卡河沉积物产量对大型风暴事件和森林采伐的响应
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
LR Basher;D. Hicks;B. Clapp;T. Hewitt
通讯作者：
T. Hewitt
DOI：
10.1080/00288330.2004.9517243
发表时间：
2004-06
影响因子：
1.6
作者：
S. Larned;M. Scarsbrook;T. Snelder;N. Norton;B. Biggs
通讯作者：
S. Larned;M. Scarsbrook;T. Snelder;N. Norton;B. Biggs
沉积物收支作为河流地貌学的组织框架
影响因子：
4.3
作者：
L. Reid;T. Dunne
通讯作者：
T. Dunne