4.7 Article

Uncertainty in data for hydrological ecosystem services modelling: Potential implications for estimating services and beneficiaries for the CAZ Madagascar

期刊

ECOSYSTEM SERVICES
卷 33, 期 -, 页码 175-186

出版社

ELSEVIER SCIENCE BV
DOI: 10.1016/j.ecoser.2018.08.005

关键词

Ecosystem services; Uncertainty; Precipitation data; Madagascar

资金

  1. Ecosystem Services for Poverty Alleviation (ESPA) programme of the United Kingdom as part of the P4GES (Can Paying 4 Global Ecosystem Services values reduce poverty?) project [NE/K010220/1]
  2. NERC [NE/K010220/1, NE/K010417/1] Funding Source: UKRI

向作者/读者索取更多资源

This study assesses the differences in modelled total runoff and modelled runoff delivered to people between different rainfall and population datasets in the Ankeniheny Zhamena Corridor (CAZ) of Eastern Madagascar. Runoff is estimated using the WaterWorld hydrological model driven by six rainfall datasets, and population is derived from five population datasets. Model results for runoff under different rainfall datasets lead to variability in runoff (coefficient of variation) up to 99% for single months and 60% in the dry season. These differences are much larger than differences in estimated runoff between baseline and complete deforestation scenario for each rainfall dataset. Population estimates for the CAZ range from 1.2 to 2 million between the population datasets. Differences in runoff under different rainfall datasets lead to an average of 356,000 people estimated to receive 90% more runoff and nearly 750,000 people estimated to receive 50% more or less runoff relative to a baseline rainfall dataset. Therefore, the choice of rainfall data in hydrological ecosystem services modelling has a large influence on estimates of ecosystem service flows highlighting the need for modellers to justify their data choices and report on uncertainties in results, particularly in light of potential policy decisions based on modelled outcomes.

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