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Influence of some microclimatic and hydrologic factors on streamflow and sediment yield of grassland watersheds in Angat / Ulysses Monilla Lutsria.

By:

Lustri, Ulysses Monilla [author]

Contributor(s):

Alferez, Arturo C [adviser]

Material type: Text

TextLanguage: English Publication details: Los Baños, Laguna, 1979. Cavite State University- Main Campus,Description: 158 pages : illustrations ; 28 cmContent type:

text

Media type:

unmediated

Carrier type:

volume

Subject(s):

DDC classification:

581.526 L97 1979

Online resources:

Click here to view thesis abstract and table of contents

Abstract: LUSTRIA, ULYSSES M. University of the Philippines at Los Banos, October, 1979. Influence Of Some Micro-climatic And Hydrologic Factors On Streamflow And Sediment Yield Of Grassland Watersheds In Angat. Major Professor: Dr. Arturo C. Alferez The influence of rainfall (amount, duration and intensity), evapotranspiration, initial and peak flows on streamflow; and that of streamflow, initial flow, peak flow, evapotranspiration and rainfall (amount, duration and intensity) on sediment yield, were studied on per storm basis. Data came from a 5-year record of two Imperata-Saccharum grassland watersheds, namely, the Right Fork (1.84 has.) and the Left Fork (0.99 ha.), located within the Angat Experimental Watershed of the Forest Research Institute. Multiple regression analysis was used. The orientation of the Right Fork was southeast while the Left was south. The slope angle of the Right Fork was 28% while that of the Left was 26%. The soil of the area was of the Novaliches clay loam type and was acidic. The soil bulk density of the Right Fork was 1.3 g/cc and the Left Fork, 1.1 g/cc. The former had a constant infiltration rate of 1.6 iph and the latter, 2.6 iph. The site belonged to the first type of Corona's climatic classification. At the Right Fork, 53% of the variation in the streamflow was due to the combined effects of the initial flow, rainfall amount and evapotranspiration. The standard partial regression coefficients revealed that initial flow and evapotranspiration were more important than rainfall amount in estimating streamflow. For the Left Fork, similar variables were responsible for 48% of the variation in streamflow; however initial flow was the most important estimator of streamflow followed by evapotranspiration then by the rainfall amount. For the sediment yield, the independent variables accounted for 62% of its variation at the Right Fork and 64% at the Left Fork. Peak flow, initial flow end evapotranspiration were the most important variables in estimating sediment yield of the Right Fork. At the Left Fork the most important factor was streamflow followed by peak flow, amount of rainfall and initial flow, in that order.

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Holdings ( 1 )
Title notes ( 4 )

Holdings
Item type	Current library	Call number	Materials specified	URL	Status	Notes	Date due	Barcode
Theses / Manuscripts	Ladislao N. Diwa Memorial Library Theses Section	581.526 L97 1979 (Browse shelf(Opens below))		Link to resource	Room use only	T-1544		00002381

Thesis (Ph.D. - - Agronomy) University of the Philippines, College, Laguna.

Includes bibliographical references.

LUSTRIA, ULYSSES M. University of the Philippines at Los Banos, October, 1979. Influence Of Some Micro-climatic And Hydrologic Factors On Streamflow And Sediment Yield Of Grassland Watersheds In Angat. Major Professor: Dr. Arturo C. Alferez

The influence of rainfall (amount, duration and intensity), evapotranspiration, initial and peak flows on streamflow; and that of streamflow, initial flow, peak flow, evapotranspiration and rainfall (amount, duration and intensity) on sediment yield, were studied on per storm basis. Data came from a 5-year record of two Imperata-Saccharum grassland watersheds, namely, the Right Fork (1.84 has.) and the Left Fork (0.99 ha.), located within the Angat Experimental Watershed of the Forest Research Institute. Multiple regression analysis was used.

The orientation of the Right Fork was southeast while the Left was south. The slope angle of the Right Fork was 28% while that of the Left was 26%. The soil of the area was of the Novaliches clay loam type and was acidic. The soil bulk density of the Right Fork was 1.3 g/cc and the Left Fork, 1.1 g/cc. The former had a constant infiltration rate of 1.6 iph and the latter, 2.6 iph. The site belonged to the first type of Corona's climatic classification.

At the Right Fork, 53% of the variation in the streamflow was due to the combined effects of the initial flow, rainfall amount and evapotranspiration.

The standard partial regression coefficients revealed that initial flow and evapotranspiration were more important than rainfall amount in estimating streamflow.

For the Left Fork, similar variables were responsible for 48% of the variation in streamflow; however initial flow was the most important estimator of streamflow followed by evapotranspiration then by the rainfall amount.

For the sediment yield, the independent variables accounted for 62% of its variation at the Right Fork and 64% at the Left Fork. Peak flow, initial flow end evapotranspiration were the most important variables in estimating sediment yield of the Right Fork. At the Left Fork the most important factor was streamflow followed by peak flow, amount of rainfall and initial flow, in that order.

Submitted to the University Library 01/07/1994 T-1544