Hydrologic Modeling of Watersheds Discharging Adjacent to the Mesoamerican Reef

Burke, L. and Sugg, Z. (2006) Hydrologic Modeling of Watersheds Discharging Adjacent to the Mesoamerican Reef. Technical Report.

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    Abstract

    This paper describes the methodology and results of a hydrologic analysis implemented by the World Resources Institute (WRI) as part of the International Coral Reef Action Network (ICRAN) Mesoamerican Reef (MAR) partnership. The objective of the analysis was to quantify the impact of human alteration of the landscape on land-based threats to the MAR to inform land-use planning, agricultural policy and practice, conservation priority setting, and risk mitigation efforts. Over a two year period, WRI collaborated with many partners in the region to evaluate sediment and nutrients coming from land in over 400 watersheds that discharge adjacent to the MAR. The analysis evaluates the amount of sediment and nutrients (nitrogen and phosphorous) coming from each plot of land; the amount of eroded sediment and nutrients reaching the river mouth (coastal discharge point); and the amount of sediment reaching the reef. In addition, the analysis provides estimates of the increase in sediment and nutrient delivery resulting from human activities, and predictions of future sediment and nutrient delivery (in 2025) given varying land-use scenarios. This analysis is the first of this scope and level of detail for the MAR region. The results provide a preliminary overview of regional patterns of sediment and nutrient runoff and delivery, and indicate how human alteration of the landscape can influence these patterns. To ensure that the project’s results and analytical methods support action in the region, WRI makes the underlying data, analytical method, and modeling tools publicly available, and has conducted training sessions with users in the region. Based on this training, regional users can implement more detailed, focused analyses for smaller areas, calibrating them to local conditions. All data used in the analysis and all model results, accompanied by metadata, are provided on the data CD, Watershed Analysis for the Mesoamerican Reef, WRI/ICRAN MAR project, 2006. This paper begins with background on the ICRAN MAR partnership and a summary of key findings, followed by a description of the analytical methodology and a summary of analysis results.

    Item Type: Technical Reports (Technical Report)
    Related URLs:
      Publisher: World Resources Institute
      Subjects: (C) Ecosystems > (CB) Marine > (CBA) Coral Reefs
      (H) Protected Areas > (HG) Nature Reserve
      (Z) Other or Unspecified
      Publication Sources: (3) Other Source > (3B) NGOs
      Date Deposited: 19 Aug 2015 16:55
      Last Modified: 19 Aug 2015 16:55
      URI: http://eprints.uberibz.org/id/eprint/1510

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