| 周伟,钟祥浩,曾云英.西藏高原农牧区生态风险评估与管理策略——以山南地区扎囊县为例[J].干旱地区农业研究,2006,(3):164~169 |
| 西藏高原农牧区生态风险评估与管理策略——以山南地区扎囊县为例 |
| Ecological risk assessment and management in farming-pastoral area in Tibet plateau — Case study in Zhanang County Lhoka Prefecture |
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| DOI：10.7606/j.issn.1000-7601.2006.03.35 |
| 中文关键词: 生态风险 评估 管理 西藏高原 山南地区扎囊县 |
| 英文关键词:ecological risk appraisal management Tibet plateau Zhanang County Lhoka Prefecture |
| 基金项目:西藏高原生态环境脆弱性与生态安全预警系统研究(2004CCAO3600) |
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| 中文摘要: |
| 在研究区界定—风险源分析—风险受体分析—风险暴露分析—风险危害分析—风险综合评价的框架内,评估了西藏山南地区扎囊县的生态风险,并对风险容忍度分析—风险决策—抗风险措施实施策略等进行了讨论分析。扎囊县综合生态风险沿雅鲁藏布江呈现对称型分布,并由河谷农业区向高山牧业区逐渐降低;各亚区的主要风险源对风险受体的危害强度差异较大,干旱是共同的风险源,造成的农牧业生产损失最为严重;抗风险措施主要有在河谷地带采取工程措施以提高抗旱、防洪和固沙能力,在半山台地加强治理居民点及交通沿线的山地灾害,在多雹区进行人工消雹;在高寒牧区向牧民传播风险知识,以加强其风险意识,提高规避风险和灾后自救能力。 |
| 英文摘要: |
| In the frame of plotting study area—risk sources analysis—risk suffer analysis—risk exposure analysis—risk imperil analysis—risk integrated analysis,the ecological risk in Zhanang County Lhoka Prefecture in Tibet was appraised,and risk management was carried out by risk tolerance analysis—risk decision making—implementing the measures of reducing risk.The results showed that:①the integrated ecological risk was presented symmetrically along Brahmaputra,and was mitigated from valley farming area to mountain pastoral area;②the hazards of main risk sources to risk suffer in each subregion was differently,drought was the common risk source and imperils farming and stock raising severely;③aimed at enhancing the ability of fighting drought,controlling flood and stabilizing sand engineering measures should be taken steps to prevent those hazards;mountain hazards must be controlled in resident area and along arterial traffic;manual work should be done to void hail in those area where hails attacked heavily;there is need to promulgated risk knowledge to herdsmen for strengthening their risk consciousness and improve the ability of preventing risk and self-help after hazards happened in the pasturing area. |
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