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Puerto Rico DroughtWatch

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Picture of Guajataca Lake, 1994.

DATA CENTER

Real-Time Data

Streamflow:
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Groundwater:
PR | VI
Water Quality:
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Precipitation:
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Lake/Reservoir:
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Data Mapper:
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Historical Data

Streamflow:
PR | VI
Groundwater:
PR | VI
Water Quality:
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Annual Data Reports
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Duration hydrographs:
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WaterWatch

Flooding:
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Drought:
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Current conditions:
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Water quality:
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Groundwater networks

Water Levels:
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Climate Response:
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*VI=Virgin Islands

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Puerto Rico Drought Information

Drought Defined

A drought is a period of drier-than-normal conditions that results in water-related problems. When rainfall is less than normal for several weeks, months, or years, the flow of streams and rivers declines, water levels in lakes and reservoirs fall, and the depth to water in wells increases. If dry weather persists and water-supply problems develop, the dry period can become a drought.

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Icon representing a journal document ANALYSIS OF 20TH CENTURY RAINFALL AND STREAMFLOW TO CHARACTERIZE DROUGHT AND WATER RESOURCES IN PUERTO RICO
By: Matthew C. Larsen

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Hydrologic Conditions of Selected Reservoirs in Puerto Rico

Icon representing water levels chart Information for selected reservoirs
The Graphs show the reservoirs water surface elevation for 1994, 2014, and 2015 years.
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Groundwater Levels of Selected Observation Wells in the South Coast of Puerto Rico

Icon representing depth-to-water levels in selected wells Information for selected observation wells
Depth-to-water is measured periodically to evaluate hydrologic conditions at important aquifers throughout Puerto Rico. The schematic below shows depth-to-water information for selected continuous recording observation wells along the South Coast aquifer, Puerto Rico.
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Levels of Lake/Reservoirs in Puerto Rico

Icon representing water levels tabular data Water levels of Reservoirs in Puerto Rico
Show the reservoirs current conditions summary table.
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The USGS provides hydrologic data collection to monitor and evaluate the effects of drought on:

  • accumulation/depletion of water in aquifers and surface-water reservoirs,
  • surface-water use for crop irrigation and public water-supply,
  • groundwater withdrawals for agriculture and public water-supply and
  • recession of streamflow at long-term surface-water stations located throughout Puerto Rico

Hydrologic studies can support successful planning and science-based decision-making by water managers who must address complex water-management issues and competing interests during periods of rainfall deficiency. Hydrologic studies and research also can help decision-makers prepare for future climate change scenarios including extended droughts.

DroughtWatch

Map of below normal 28-day average streamflow compared to historical streamflow for the day of year

Map of below normal 28-day average streamflow compared to historical streamflow for the day of year.

Map legend for below normal 7-day average streamflow condition map

This map (from USGS's National Drought Watch Web site) shows the 28-day average streamflow conditions in hydrologic units. Thus, the map shows conditions adjusted for this time of the year. The colors represent 28-day average streamflow percentiles for the day of the year. USGS sites having at least 30 years of record are used. The data used to produce this map are provisional and have not been reviewed or edited.

Explanation of the Percentiles classes

A percentile is a value on a scale of one hundred that indicates the percent of a distribution that is equal to or below it. See more


Puerto Rico DroughtWatch Maps

Drought Links

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Page Last Modified: Tuesday, 26-Apr-2016 10:50:53 EDT