自然资源学报 ›› 2019, Vol. 34 ›› Issue (9): 1987-2000.doi: 10.31497/zrzyxb.20190914

• 资源生态 • 上一篇    下一篇

气象干旱对甘肃省榆中县乡村社会—生态系统的影响

石育中1,2, 杨新军2, 赵雪雁1   

  1. 1. 西北师范大学地理与环境科学学院,兰州 730070;
    2. 西北大学城市与环境学院,西安 710127
  • 收稿日期:2019-02-25 修回日期:2019-06-19 出版日期:2019-09-28 发布日期:2019-09-28
  • 通讯作者: 杨新军(1972- ),男,陕西扶风人,博士,教授,博士生导师,研究方向为旅游地理学与人地关系的社会—生态整合研究。E-mail: yangxj@nwu.edu.cn
  • 作者简介:石育中(1988- ),男,甘肃礼县人,博士,讲师,研究方向为社会—生态系统脆弱性与区域可持续发展。E-mail: syz19880919@126.com
  • 基金资助:
    国家自然科学基金项目(41571163)

Impacts of meteorological drought on social-ecological system in rural areas of Yuzhong county in Gansu province

SHI Yu-zhong1,2, YANG Xin-jun2, ZHAO Xue-yan1   

  1. 1. College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China;
    2. College of Urban and Environmental Sciences, Northwest University, Xi'an 710127, China
  • Received:2019-02-25 Revised:2019-06-19 Online:2019-09-28 Published:2019-09-28

摘要: 干旱影响研究是干旱及半干旱地区人地关系研究的重要内容,社会—生态系统的视角为西北地区生态脆弱—贫困区的可持续性研究提供了新的思路。选取甘肃省榆中县为研究区,运用标准化降水指数、干旱经济损失估算模型和GIS分析工具,分析干旱对粮食产量、经济发展和农户家庭的影响,归纳干旱对乡村社会—生态系统的影响机制。研究结果表明:(1)1960-2015年,榆中县气象干旱程度较强,且与粮食产量呈显著正相关,尤其对榆中县南、北部山区的粮食产量影响显著;(2)气象干旱造成的经济损失具有频率高和空间分布广的特征,经济损失严重区集中在榆中县南、北部山区;(3)农户家庭受灾面积较大,农作物减产和家庭收入损失明显,气象干旱造成的粮食安全问题严重,且“纯农型”家庭收入损失和粮食安全问题尤为突出;(4)水资源利用环、产量环、收入环—生计环和经济环为干旱影响社会—生态系统运行机制的关键环节。

关键词: 干旱, 干旱经济损失估算模型, 乡村社会-生态系统, 标准化降水指数, 因果循环

Abstract: Impacts of drought play a vital role in studies on human-environment relationship in arid and semiarid regions. The assessment on the impacts of drought on social-ecological system in rural areas provides a new thinking for human-environment system sustainability of ecological fragile-poverty zone in Northwest China. The article analyses the impacts of drought on grain yield, economic development and rural household family. Then, it concludes impact mechanism of meteorological drought on social-ecological system in rural areas, applying Standardized Precipitation Index, economic loss of drought model and analysis tool of GIS. The main results include: (1) There is significant positive correlation between drought intensity and grain yield especially in the southern and northern parts of Yuzhong county, where drought intensity is high in 1960-2015. (2) Serious economy loss caused by drought characterized with high frequency and wide distribution occurs in the southern and northern parts of Yuzhong county. (3) Drought causes reduction of agricultural product and economic income obviously, and results in serious food security of rural household families that are engaged just in agriculture activity. (4) Impact mechanism of drought on social-ecological system in rural areas depends on water resource utilization loop, production loop, income and livelihood loop and economy loop.

Key words: casual loop, standardized precipitation index, drought, social-ecological system in rural areas, economic loss of drought model