ISWC OpenIR  > 水保所知识产出(1956---)
延安极端降雨特性分析及对梯田侵蚀灾害影响
李慧娟1,3; 高建恩1,2,3; 张元星2,4; 白先发1,3; 孙彭成2
2016
Source Publication水土保持学报
Volume30Issue:6Pages:79-84
Abstract

针对以增暖为主要标志的全球变化导致气候变率增大,极端天气气候事件和灾害发生更为频繁,造
成人口、农业经济生产、基础设施风险扩大的现实,以2013年造成延安多地严重受灾极端降雨特性及其对
梯田侵蚀影响严重为例,基于延安站多年逐日降雨资料和梯田侵蚀实地测量资料,分析了该极端降雨的特
征并探讨了其对梯田侵蚀灾害的影响。结果表明:( 1 )延安2013年降雨总量达到959mm
,比1951
— 2012
多年平均降雨量高出448.8mm
,其中7
— 9月降雨量达到761mm ,占全年降雨量的79.4% ,最大月降雨7
月为568mm ,达到万年一遇标准;(
2 )延安2013年极端降雨侵蚀性降雨和暴雨次数多,暴雨总量大,同时
降雨出现短历时中强度、中历时高强度、长历时强侵蚀弱输沙的新变化;( 3 )延安2013年极端降雨下连片
梯田侵蚀剧烈,侵蚀模数和相对高差与汇水面积之间存在显著关系,梯田中下部侵蚀严重,最大土壤侵蚀
模数达到54 049.50t / km
2 ,该研究可为水土保持农业梯田工程设计提供依据,同时将为气候变化条件下有
效应对该类极端降雨采取永久措施和临时措施及适应性调控提供科技支撑。

Other Abstract

 In view of the fact that the global change which was mainly marked by warming resulted in that the
climate change rate increased , the extreme weather and climate events and disasters were more frequent , and
the risk of population , agricultural economic production and infrastructure were enlarged.A case on the
characteristics of extreme rainfall in Yan ’ an of 2013and its severe erosion on the terraces was analyzed which
was based on years of daily rainfall data of Yan ’
an station and terraces erosion field measuring data.The
results were showed as bellows :( 1 ) The total extreme rainfall of Yan ’ an in 2013reached 959mm , 448.8
mm higher than the mean annual rainfall ( 1951 — 2012 ) .Rainfall from July to September reached 761mm ,
which accounted for 79.4% of the whole year and among which the maximum monthly
rainfall happened in
July ( 568mm ), reaching
the standard of million years ;( 2 ) The number of erosive rainfall and rainstorm was
much more than before and the total amount of rainstorm was large.Meanwhile , the extreme rainfall showed
new changes of short duration and moderate intensity , moderate duration and high intensity ,
long
duration ,
strong erosion and weak sediment transport
;(
3 ) The contiguous terraces were eroded seriously in the ex -
treme rainfall.The soil erosion modulus of terrace had significant correlations with relative elevation and
catchment area.The erosion of the moderate and lower terraces was serious and the maximum soil erosion  modulus reached 54 049.50t / km
2 .This study
would provide the basis for the design of agricultural soil and
water conservation terrace engineering , and also provide support to take permanent and temporary
measures
to prevent the extreme rainfall under climate change conditions.

Keyword延安 极端降雨 梯田 剧烈侵蚀
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8671
Collection水保所知识产出(1956---)
Affiliation1.中国科学院教育部水土保持与生态环境研究中心,陕西 杨凌712100
2.西北农林科技大学, 陕西 杨凌712100
3.中国科学院大学,北京100049
4.湖南省水利厅,长沙410000 ;
Recommended Citation
GB/T 7714
李慧娟,高建恩,张元星,等. 延安极端降雨特性分析及对梯田侵蚀灾害影响[J]. 水土保持学报,2016,30(6):79-84.
APA 李慧娟,高建恩,张元星,白先发,&孙彭成.(2016).延安极端降雨特性分析及对梯田侵蚀灾害影响.水土保持学报,30(6),79-84.
MLA 李慧娟,et al."延安极端降雨特性分析及对梯田侵蚀灾害影响".水土保持学报 30.6(2016):79-84.
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