Managing water services in tropical regions: From land cover proxies to hydrologic fluxes
Managing water services in tropical regions: From land cover proxies to hydrologic fluxes
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DOI：
10.1007/s13280-014-0578-8
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发表时间：
2015-09
期刊：
影响因子：
6.5
通讯作者：
A. Ponette-González;K. Brauman;E. Marín-Spiotta;K. Farley;K. Weathers;K. Young;L. Curran
中科院分区：
文献类型：
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作者：
A. Ponette-González;K. Brauman;E. Marín-Spiotta;K. Farley;K. Weathers;K. Young;L. Curran
流域投资项目经常使用土地覆盖作为基于水的生态系统服务的代理，一种基于土地覆盖和水文结果之间的假设关系的方法。水流量很少量化，而且意外结果很常见，这表明土地覆盖本身并不是供水服务的可靠替代物。我们认为，管理的关键水文通量在现场的干预比促进特定的土地覆盖类型更有效。超越土地覆被替代指标，关注水文通量，要求项目（1）确定感兴趣的特定水服务和相关的水文通量;（2）考虑相关土地覆被的结构和生态特征;（3）确定目标水文通量的关键介质。使用热带地区的例子，我们说明了这个概念框架可以澄清干预提供所需的水服务比土地覆盖作为代理的概率更高。
Watershed investment programs frequently use land cover as a proxy for water-based ecosystem services, an approach based on assumed relationships between land cover and hydrologic outcomes. Water flows are rarely quantified, and unanticipated results are common, suggesting land cover alone is not a reliable proxy for water services. We argue that managing key hydrologic fluxes at the site of intervention is more effective than promoting particular land-cover types. Moving beyond land cover proxies to a focus on hydrologic fluxes requires that programs (1) identify the specific water service of interest and associated hydrologic flux; (2) account for structural and ecological characteristics of the relevant land cover; and, (3) determine key mediators of the target hydrologic flux. Using examples from the tropics, we illustrate how this conceptual framework can clarify interventions with a higher probability of delivering desired water services than with land cover as a proxy.