摘要
了解区域土壤保持能力的变化对制定生态环境的修复和养护策略具有重要的参考价值.本研究以了解三江源生态屏障区土壤保持能力的变化为目的,主要基于植被和降水的变化利用In VEST模型分析了2000年、2010年、2020年玛多县的潜在土壤流失量、实际土壤流失量、土壤保持量变化,结果表明:(1)玛多县土壤保持能力的三个指标2000—2020年均呈现先增加后减少的态势.(2)空间分布上,前两项指标三期均呈点状或块状稀疏分布,高值主要集中在东北部的东西两侧区域和南部偏东的大部分区域,中部以西地区潜在土壤流失量、实际土壤流失量较小;土壤保持量则呈块状分布,高值集中在东部及西南端小部分区域,其他区域土壤保持量较小.(3)玛多县土壤保持能力变化以降水为主导,但植被或地表覆盖的变化则为其提供环境条件,因此,加强植被管护或持续的地表覆盖修复是稳定区域土壤保持能力的关键.本研究对气候变化背景下,青藏高原土壤保持与生态修复和管理策略的制定具有一定的参考价值.
Understanding the changes of regional soil conservation capacity has important reference value for formulating ecological environment restoration and conservation strategies.In order to understand the changes of soil holding capacity in the ecological barrier area of the Three Rivers Sources,the In VEST model was used to analyze the potential soil loss,actual soil loss,soil retention changes,the results show:(1)From 2000 to 2020,the three indicators of soil conservation capacity in Maduo County showed a trend of first increase and then decrease.(2)In terms of spatial distribution,the first two indicators are all sparsely distributed in point or block shape in the three phases.Soil loss and actual soil loss were small;soil conservation was block-shaped,with high values concentrated in a small part of the eastern and southwestern regions,and soil conservation in other areas was small.(3)The change of soil conservation capacity in Maduo was dominated by precipitation,but the change of vegetation or land cover provided environmental conditions for it.Therefore,strengthening vegetation management or continuous land cover restoration was the key to stabilize the regional soil conservation capacity.This study has certain reference value for the formulation and implementation of soil conservation and ecological restoration and management strategies in the Qinghai-Tibet Plateau under the background of climate change.
作者
夏兴生
田绍梅
吕圣慧
潘耀忠
XIA Xing-sheng;TIAN Shao-mei;LV Sheng-hui;PAN Yao-zhong(Academy of Plateau Science and Sustainability,Qinghai Province-Beijing Normal University,Xining 810016,China;State Key Laboratory of Remote Sensing Science,Beijing Normal University,Beijing 100875,China;College of Geographical Sciences,Qinghai Normal University,Xining 810016,China)
出处
《青海师范大学学报（自然科学版）》
2022年第3期10-19,共10页
Journal of Qinghai Normal University(Natural Science Edition)
基金
第二次青藏高原综合科学考察研究(2019QZKK0603,2019QZKK0906)
国家高分辨率对地观测系统(民用部分)重大专项
青海省中央引导地方科技发展专项
作者简介
夏兴生(1989-),男,甘肃庆阳人,博士,副教授.研究方向:资源环境定量遥感应用;田绍梅(1998-),女,青海大通人,学士.研究方向:生态系统服务功能变化研究.
