出售的访问权限是什么? 加利福尼亚州的覆盖权,土地交易和地下水
Jenny Linder Rempel1, Ella Belfer1, Isha Ray1
1Energy & Resources Group, University of California, Berkeley, CA, United States of America.
概括
农田销售正在改变加利福尼亚州的地下水供应. 企业买家正在钻井更深的井,可能会在干旱期间加剧地下水不平等.
科学领域:
- 环境科学 环境科学
- 农业经济学 农业经济学
- 水文学的水文学
背景情况:
- 由于气候变化,地下水的可持续性和获取越来越有争议.
- 私人土地所有权对地下水的接入有很大影响,但市场驱动的变化尚未得到充分研究.
- 农田市场可能会改变地下水获取模式,影响资源公平.
研究的目的:
- 分析2003-2017年间农田交易如何影响加利福尼亚州的地下水获取模式.
- 调查不同类型的买家在新交易的地块上对井建设的变化.
- 评估对地下水治理和公平性的影响,特别是在干旱期间.
主要方法:
- 构建一个新的数据集,将井建设缩小到块地层面.
- 从2003年至2017年对覆盖地下水资源的农田交易的分析.
- 在2011-2017年干旱期间,圣若金山谷根据购买者类型对地下水获取变化的描述.
主要成果:
- 农业用地所有权发生了重大转变,全州销售了21.1%的农业用地.
- 临界开支过剩的盆地显示了农田周转率最高的农田.
- 企业收购农田的数量增加,而新的企业所有者与个人土地所有者相比,钻井的深度要大得多.
结论:
- 农田市场的动态正在重塑地下水的获取,有利于企业实体.
- 企业所有者的更深井建设可能会加剧地下水枯竭和不公平.
- 调查结果强调了需要适应性地下水治理来解决结构性不平等的问题.
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