A proposed streamflow-data program for Puerto Rico

López, Miguel A.; Fields, Fred K.

doi:10.3133/ofr70199

Cited by 5 publications

(4 citation statements)

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“…The USGS and other local government agencies have been operating stage-recording stream gauging stations in PR since 1958 with 10 and eventually 63 continuous recording stations in 1960 and 1970, respectively [83]. Automated gages have measured flow rates at 5-15 min intervals at stream reaches with drainage areas ranging from 10 −1 to 1.8 × 10 3 km 2 [84].…”

Section: Development Of Tc Q P and 24 H Rainfall Rate Databasementioning

confidence: 99%

A Catalogue of Tropical Cyclone Induced Instantaneous Peak Flows Recorded in Puerto Rico and a Comparison with the World’s Maxima

2021

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Peak streamflow rates from the Insular Caribbean have received limited attention in worldwide catalogues in spite of their potential for exceptionality given many of the islands’ steep topographic relief and proneness to high rainfall rates associated with tropical cyclones. This study compiled 1922 area-normalized peak streamflow rates recorded during tropical cyclones in Puerto Rico from 1899 to 2020. The results show that the highest peak flow values recorded on the island were within the range of the world’s maxima for watersheds with drainage areas from 10 to 619 km2. Although higher tropical cyclone rainfall and streamflow rates were observed on average for the central–eastern half of Puerto Rico, the highest of all cyclone-related peaks occurred throughout the entire island and were caused by tropical depressions, tropical storms, or hurricanes. Improving our understanding of instantaneous peak flow rates in Puerto Rico and other islands of the Caribbean is locally important due to their significance in terms of flooding extent and its associated impacts, but also because these could serve as indicators of the implications of a changing climate on tropical cyclone intensity and the associated hydrologic response.

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Section: Development Of Tc Q P and 24 H Rainfall Rate Databasementioning

confidence: 99%

A Catalogue of Tropical Cyclone Induced Instantaneous Peak Flows Recorded in Puerto Rico and a Comparison with the World’s Maxima

2021

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“…Multiple-regression results using records through December 1969 (Lopez and Fields, 1970) Although the standard error of estimate of the regression gives an approximation of the standard error of the flow characteristic, the standard error of prediction is a better parameter for evaluating accuracy of the regression equation. As shown by Matalas and Gilroy (1968) , the accuracy of a prediction depends in part on how much of the standard error of estimate is due to timesampling error (error in the characteristic at the stations used in the regression) and how much is due to error in the underlying relation between the true values of the flow characteristics.…”

Section: Q2mentioning

confidence: 99%

“…A previous study of magnitude and frequency of floods in Puerto Rico was made in a U.S. Geological Survey open-file report entitled "A Proposed Streamflow-Data Program for Puerto Rico" prepared in cooperation with the Commonwealth of Puerto Rico by M. A. Lopez and F. K. Fields (1970). This report used records through December 1969 and presented equations for the 5-, 10-, 25-, and 50-year recurrence-interval floods.…”

mentioning

confidence: 99%

Floods in Puerto Rico, magnitude and frequency

López¹,

Colon-Dieppa²,

Cobb³

1979

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Annual-peak discharge records at 50 sites with 5 or more years of record were used to determine individual site log-Pearson Type III frequency curves. The log-Pearson Type III frequency curve values for 2-, 10-, 25-, 50-, and 100-year recurrence intervals at 37 of these sites with 10 or more years of record were regressed against basin characteristics. Drainage area and mean annual rainfall proved to be the only independent variables significant at the 95 percent confidence level. The regression equations are: Q2 = 0.033 A* 776 (Ann P) 2 ' 11 SER = +51,-34 percent Q 1Q = 3.72 A-822 (Ann P) 1-29 SE = +45,-31 percent Q25 = 25.7 A' 826 (Ann p)* 953 SER = +50,-33 percent Q50 =89.9 A-830 (Ann p)-734 SE^ = +55> _36 percent Q 10Q = 286 A* 832 (Ann P)' 531 SER = +61,-38 percent where Q is the T-year recurrence interval peak discharge, A is the drainage area in square miles, (Ann P) is the weighted mean annual precipitation in inches, and SE is the standard error of estimate of the regression. All flood data in Puerto Rico through December 1975 were analyzed. Shortterm records were extended to include historic flood records. Frequency curves were computed by methods that tend to reduce time-sampling errors. A stepwise regression technique was-used to relate flood frequency at the gaged sites to areal parameters.

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“…The principal topographic feature of the island is the Cordillera Central, an east-west mountain range with peak elevations commonly ranging from 3,000 to 4,000 feet above sea level. The Cordillera Central divides the island into a northern two-thirds and a southern one-third, forming the principal drainage divide of the larger streams (López, Colón-Dieppa, & Cobb, 1979;López & Fields, 1970).…”

Section: Hydro-meteorology Of Puerto Ricomentioning

confidence: 99%

Predicting floods from space

Emigh¹

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A proposed streamflow-data program for Puerto Rico

Cited by 5 publications

References 0 publications

A Catalogue of Tropical Cyclone Induced Instantaneous Peak Flows Recorded in Puerto Rico and a Comparison with the World’s Maxima

A Catalogue of Tropical Cyclone Induced Instantaneous Peak Flows Recorded in Puerto Rico and a Comparison with the World’s Maxima

Floods in Puerto Rico, magnitude and frequency

Predicting floods from space

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