Results 11 to 20 of about 37,201 (140)

A systematic review of 20 years of crisis and disaster research: Trends and progress

open access: yesRisk, Hazards &Crisis in Public Policy, Volume 12, Issue 4, Page 374-392, December 2021., 2021
Abstract The field of crisis and disaster studies has proliferated over the past two decades. Attention is bound to grow further as the world negotiates the prolonged challenges of the Covid‐19 pandemic. In this review, we provide an overview of the main foci, methods, and research designs employed in the crisis and disaster research fields in the ...
Jeroen Wolbers   +2 more
wiley   +1 more source

黄土高原水蚀风蚀交错带风蚀对砂质壤土迎风坡水蚀特征的影响

open access: yesShuitu Baochi Xuebao, 2022
为明确风水交错侵蚀中风力和水力侵蚀的相互影响,针对风向和径流方向相反(迎风坡)的交错侵蚀,采用人工模拟降雨与风洞试验研究前期风蚀对后继水蚀的影响。结果表明:(1)受前期风蚀影响,后继水蚀产流时间均较仅水蚀提前,径流强度较仅水蚀增大。(2)前期风蚀加剧后继水蚀却未改变其变化趋势。无论是否有前期风蚀影响,后继水蚀速率随降雨历时增加均逐渐增大而后趋于平稳;但当前期风蚀的风速较大时(12,15 m/s),后继水蚀速率较仅水蚀增大最显著,其侵蚀速率高达仅水蚀速率的4.6倍。(3)受前期风蚀影响 ...
白茹茹   +4 more
doaj   +2 more sources

东北黑土区冻融、风力、水力交互作用对坡面侵蚀的影响

open access: yesShuitu Baochi Xuebao, 2021
多种外营力作用的复合侵蚀是东北黑土区坡耕地的主要侵蚀特征,但目前缺乏冻融、风力、水力之间相互作用对复合侵蚀影响的量化研究。基于此,采用室内冻融模拟、风洞试验和降雨模拟试验相结合的研究方法,分析了前期土壤冻融作用对土壤风蚀以及前期土壤冻融和风力叠加作用对后期坡面水蚀的影响。结果表明,前期土壤冻融作用显著增加了后期坡面的风蚀量 ...
桑琦明   +8 more
doaj  

近39年东北地区风蚀气候侵蚀力及其对气候变化的响应

open access: yesShuitu Baochi Xuebao, 2023
为评估东北地区风蚀气候侵蚀力及其对区域气候变化的响应,基于东北地区66个气象站点1981—2019年气象数据,采用风蚀气候侵蚀力计算方法,解析东北地区风蚀气候侵蚀力空间分布特征、时间变化趋势及其对气候变化的响应。结果表明:近39年(1981—2019年),东北地区风速和相对湿度呈下降趋势,降水量呈波动增加趋势,气温呈上升趋势;风蚀气候侵蚀力整体呈西高东低趋势,全区平均为18.8,空间变化范围为0.9~63.8;春、夏、秋和冬季的风蚀气候侵蚀力分别为10.4,1.4,4.1和2.9 ...
杨婉蓉   +5 more
doaj  

土壤侵蚀的流体力学机制(Ⅱ)-风蚀

open access: yes, 1996
土壤的加速侵蚀已成为当前全球性环境灾害之一.对土壤侵蚀及其预防、控制的研究引起了人们的普遍关注.本文通过对国外文献的广泛调研 ...
王柏懿, 戚隆溪
core   +2 more sources

基于不同风蚀模型的区域土壤风蚀变化及影响因素研究——以内蒙古自治区为例

open access: yesShuitu Baochi Xuebao, 2021
基于遥感数据、气象数据等,利用RWEQ模型和风蚀预报模型对内蒙古自治区2000—2017年土壤风蚀进行评估并分析其驱动因素。结果表明:(1) RWEQ模型(R2=0.85 ...
李鑫, 武志涛, 杜自强, 张红
doaj  

挟沙风对土壤风蚀的影响研究

open access: yesShuitu Baochi Xuebao, 2005
风沙流的危害是多方面的,不仅破坏地表结构,削弱土壤的抗风蚀性,而且影响到植物的生长,损坏工农业设施。通过在便携式风洞内模拟挟沙气流,研究了风沙流对土壤风蚀的影响。结果表明,风沙流可不同程度地降低土壤地表结构的临界起沙风速,使土壤变得更易风蚀。风沙流因子对于土壤风蚀的影响,在不同的风速段具有不同的特征。在较低风速段,风蚀量随风速增加缓慢,当风速进一步加大,风蚀量则急剧增加,其差异最多可达4倍之多;而当风速增大到10m/s以上时,风蚀量反而有所减小,说明随着风速的加大,更多的沙粒具有了更大的动能 ...
移小勇 赵哈林 张铜会 李玉强 刘新平 卓鸿
doaj   +2 more sources

Critical Infrastructure, Climate Disasters, and Cultural Survival: Policy Failures and Community Displacement in the Era of Managed Retreat

open access: yesJournal of Critical Infrastructure Policy, Volume 7, Issue 2, Fall/Winter 2026.
ABSTRACT Climate disasters are currently changing territory around the world by showing large inequalities that exist in infrastructure systems, governance arrangements, and development pathways. In many cases, climate risk response strategies like managed retreat have been framed as practical approaches to respond to increasing climate disasters ...
Chick Edmond
wiley   +1 more source

Video Assistant Referee(ndums): A Populist Weapon or Effective Tool to Stop Autocrats in Competitive Authoritarian Regimes in Latin America?

open access: yesLatin American Policy, Volume 16, Issue 4, December 2025.
ABSTRACT In recent years, video assistant referee systems have been increasingly used to correct unfair decisions in sports. Similarly, I argue that constitutional referendums play a corrective role in hybrid or competitive authoritarian regimes, where the electoral referee is biased and the government enjoys unfair advantages.
Muhammet Derviş Mete
wiley   +1 more source

土地沙漠化过程的土壤风蚀率指标——以青海共和盆地为例

open access: yesShuitu Baochi Xuebao, 2003
由风蚀所导致的土壤物质再分配过程,决定了土地沙漠化的程度。根据半干旱干草原地区不同程度沙漠化土地土壤风蚀率的137Cs示踪结果,沙漠化各个阶段的土壤风蚀率指标为:潜在沙漠化土地以微弱堆积和微度风蚀为特征,风蚀率小于2000kg/(hm2·a);轻度沙漠化土地风蚀率介于2000~7000kg/(hm2·a)之间;中度沙漠化土地风蚀率大于7000kg/(hm2·a);重度沙漠化土地风蚀和堆积都很强烈,地表物质交换迅速,没有必要制定风蚀指标。
张春来 邹学勇 董光荣
doaj   +2 more sources

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