Modeling the hydrolgic response to land use and land cover change of the magat Watershed/ (Record no. 279)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 04945nam a22001817a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20250321104823.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 250321b |||||||| |||| 00| 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | NVSU |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Bartolome, Catherine A. |
| 245 ## - TITLE STATEMENT | |
| Title | Modeling the hydrolgic response to land use and land cover change of the magat Watershed/ |
| Statement of responsibility, etc. | Catherine A. Bartolome |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Bayombong: |
| Name of publisher, distributor, etc. | Nueva Vizcaya State University, |
| Date of publication, distribution, etc. | 2021. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | xiii, 82 leaves : |
| Other physical details | colored illustrations ; |
| Dimensions | 28 cm. |
| 500 ## - GENERAL NOTE | |
| General note | Watershed plays a very important role in the hydrologic balance. One of the factors accountable in altering the hydrologic response of watershed is the land use and land cover (LULC) change affecting, particularly, the water quantity. The extent of these changes on catchment hydrology will be needed for the planning and implementation of various water resources projects. The main objective of this study was to assess the hydrologic responses to LULC change of the Magat Watershed located in the northern part of the Philippines. In particular, the study evaluates the LULC change for the period 2003 and 2015 and the effect these changes have had on water quantity, specifically, streamflow in the watershed using the Soil and Water Assessment Tool (SWAT). The SWAT model simulation was performed for a period of 23 years. Calibration and validation were performed through comparison of the simulated and observed streamflow from the gauging stations, the Magat and Bagabag stations. The outputs were calibrated for the period 1998 to 2007 and validated for the period 2008 to 2017 for the Magat station. Due to insufficient streamflow data for the Bagaheg station, the calibration and validation was deme for the period 2001 so 2007 and 2008 to 2013, respectively Sensitivity analysis was also performed to identify the most sensitive parameters out of the 12 parameters selected and so determine the best fitted values for each of the parameters. It was found out that the baseflow alpha factor (ALPHA BF) was the most sensitive parameter that could possibly affect the SWAT model output. The calibration and validation processes yielded the values 0.77, 59.98% and 0.69 for the Pearson Coefficient (r), Coefficient of Determination (r) and Nash-Sutcliffe Efficiency (NSE), respectively. These values imply that the performance rating of the model, generally, is good. The LULC change analysis revealed that range-grasses (RNGE) and residential built-up (URBN) have the greatest increase with a rate of change of 414.50% and 340.70%, respectively. Additionally, the LULC change detection analysis performed using the ArcGIS depicted that the range-brush/shrubs (RNGB) has contributed to the increase of forest-mixed (FRST) and RNGE and for the expansion in URBN and water (WATR), the agricultural land-generic (AGRL) has the greatest contribution. In the evaluation on hydrologic response of streamflow due to LULC changes, the output of simulation resulted to a minimal variability for the three components that contribute to streamflow. Surface runoff and lateral flow has a minimal increase 0.22% and 3.41%, respectively, whereas, groundwater has a decrease of 11.53%. Though there was an increase in URBN, there was also an increase in FRST and RNGE, thus, this change resulted to a minimal increase in surface runoff, since the effect in the expansion in URBN compensated the increase in RNGE. As surface runoff and groundwater flow are the major components contributing to streamflow, with FRST and RNGB, the infiltration increases and further lead to decreased surface runoff and increase of groundwater flow. On the other hand, URBN had the strongest contribution in surface runoff due to reduced infiltration rates on the impervious surface. The study also evaluated the hydrologic response on streamflow using different LULC scenarios. From the simulation results of the three scenarios, it was depicted that the greatest effect was observed in scenario 3 where there was a remarkable increase in surface runoff and a notable decrease in lateral flow and groundwater flow. Generally, from the results of this study, it is good to conclude that the calibrated model can accurately simulate and could be effectively used to simulate streamflow in the Magat watershed and a confirmation that the calibrated model can be used to examine the responses of hydrological processes to LULC change in watershed. Further, the output of this study can be used as a decision support tool for policy makers and water resources planners for a sustainable watershed management.<br/><br/>Keywords: hydrologic modeling, LULC change, streamflow, SWAT, water quantity<br/><br/> |
| 500 ## - GENERAL NOTE | |
| General note | Thesis (Master of Science in Ahttp://elibrary.nvsu.edu.ph:8080/cgi-bin/koha/cataloguing/addbiblio.pl?frameworkcode=#tab4XX_panelgricultural Engineering - Soil and Water Management) |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE | |
| Bibliography, etc. note | Includes appendices and bibliographical references. |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Thesis |
| Suppress in OPAC | No |
| Withdrawn status | Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Source of acquisition | Total checkouts | Full call number | Barcode | Date last seen | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | Nueva Vizcaya State University - Bayombong Campus | Nueva Vizcaya State University - Bayombong Campus | Graduate School Section | 03/21/2025 | Donation | T B292m 2021 | T 902 | 03/21/2025 | 03/21/2025 | Thesis |
