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塘背河小流域植被覆盖时空动态变化及水保驱动分析

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
  • 维普
塘背河小流域位于赣南革命老区和全国第一个水土保持改革试验区腹地,是我国第一批水土保持治理试点小流域,系统、科学评估塘背河小流域水土保持生态修复成效,对赣南水土保持改革试验区建设和水土保持高效治理技术模式提炼具有重要现实意义.利用40a遥感影像数据和水土保持治理数据,基于NDVI阈值分割法,开展了塘背河小流域植被覆盖时空动态变化以及水保驱动分析.结果表明:近40年塘背河小流域植被覆盖度由1975年的22.91%已提升到2014年的86.87%,随时间呈递增趋势;在时间和空间上均有差异性,时间上主要分为植被覆盖迅速增长期(1975-1989年),植被覆盖自我修复完善期(1989-2001年)以及植被覆盖稳固发展期(2001-2014年)3个阶段,空间上分为上游原有植被自我修复区、中游人工半干预植被修复区和下游人工直接干预植被修复区3个分区;植被覆盖与水土保持工程在时间和空间上具有较好的一致性,后期水土保持政策实施以及水土保持新技术、模式的应用大大减少了植被覆盖空间上的差异性,对于植被修复具有重要的推动作用,人类大规模农林开发在植被修复研究方面,不容忽视.
Temporal and spatial variation of vegetation cover and its water and soil conservation driving in Tangbei River watershed
The Tangbei river watershed is located in the Gannan old revolutionary base area and is the first national soil and water conservation reform pilot area in China.The scientific evaluation of the effect of soil and Water Conservation Ecological Restoration of Tangbei River watershed is of great practical sig -nificance to the construction of the soil and water conservation reform pilot area in Gannan revolutionary area.Based on the 40 years remote sensing images and soil and water conservation data, the temporal and spatial dynamic change of vegetation cover and the driving of water and soil conservation were carried out based on the NDVI threshold segmentation method.The results showed that,in the past 40 years,the vegetation coverage of the Tangbei river watershed increased from 22.91%in 1975 to 86.87%in 2014;and there were significant differences in time and space on vegetation cover, the time was divided into three stages:the rapid growth period of vegetation cover(1975-1989),self repair improvement period (1989-2001),and vegetation cover stable development period(2001-2014).It was spatially divided into three parts: the upper reaches of the original vegetation restoration area, the middle reaches of the artificial semi intervention vegetation restoration area and the downstream artificial direct intervention veg -etation restoration area.The vegetation cover and soil and water conservation project had good consistency in time and space,and the application of the soil and water conservation policy and the new technology of soil and water conservation in the late stage greatly reduced the spatial differences, which was important to the vegetation restoration.The research on the large -scale development of agriculture and forestry in vegetation restoration cannot be ignored.

vegetation covertemporal and spatial variationthe driving of water and soil conservationTangbei River watershed

宋月君、廖凯涛、杨洁、左继超、肖龙

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江西省土壤侵蚀与防治重点实验室,江西南昌330029

江西省水土保持科学研究院,江西南昌330029

福建农林大学林学院,福建福州350002

泰和县水土保持站,江西吉安343700

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植被覆盖 塘背河小流域 时空变化 水保驱动

国家科技支撑项目国家自然科学基金国家自然科学基金水利部公益性行业科研专项经费项目水利部公益性行业科研专项经费项目水利部公益性行业科研专项经费项目西省科技计划项目江西省水利重大科技项目江西省水利重大科技项目

2014BAD15B03034146105841401311201501047201501045江2015ZBBF60010KT201616KT201518

2017

10.11705/j.issn.1672-643X.2017.05.04

水资源与水工程学报
西北农林科技大学

水资源与水工程学报

CSTPCDCSCD
影响因子：0.512
ISSN：1672-643X
年,卷(期)：2017.28(5)
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