Laguna Lake Development Authority(DENRLLDA)

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Date: Sept. 14, 2022, 12:21 p.m.

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Date: 2022-09-23 12:45:33.000000

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Date: 2023-01-05 14:50:41.000000

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Water Hyacinth Satellite Imagery and Other Data in Laguna Lake

Published by Laguna Lake Development Authority(DENRLLDA) on Sept. 14, 2022.
Requested from LLDA by C. Amonelo at 12:21 PM on Sept. 14, 2022.
Purpose: Research (Undergraduate Thesis)
Date of Coverage: 12/01/2019 - 12/30/2020
Tracking no: #DENRLLDA-844385647530

A.VILLAREAL Sept. 14, 2022, 12:21 p.m.

Hi! I would like to request the data regarding the following: [1] Monthly Satellite Imagery/Map of Water Hyacinth Distribution from December 2019 until December 2020. Preferably, the data is in image format. And I would also like to request its KML/TIFF or other formats that can be used in a GIS program (ArcGIS), if available. [2] Total Phosphorus, Total Nitrogen, Water Surface Temperature, Total Dissolved Solids, pH in Laguna Lake from December 2019 until December 2020

P.MARIANO Sept. 23, 2022, 12:45 p.m.

September 23, 2022 Dear Ana Mae, Thank you for your request dated Sep 14, 2022 under Executive Order No. 2 (s. 2016) on Freedom of Information in the Executive Branch, for Water Hyacinth Satellite Imagery and Other Data in Laguna Lake. We received your request on Sep 14, 2022 and will respond on or before Oct 05, 2022 12:21:16 PM, in accordance with the Executive Order's implementing rules and regulations. Should you have any questions regarding your request, kindly contact me using the reply function on the eFOI portal at https://www.foi.gov.ph/requests/aglzfmVmb2ktcGhyIgsSB0NvbnRlbnQiFURFTlJMTERBLTg0NDM4NTY0NzUzMAw, for request with ticket number #DENRLLDA-844385647530. Thank you. Respectfully, Peter Jedel Mariano FOI Officer

P.AND EVALUATION DIVISION Jan. 5, 2023, 2:50 p.m.

(Note: Data requests was provided thru [email protected], dtd October 21, 2022) copy of email: Dear Ms. Villareal, Please note that the information contained in the provided document is subject to Agreement for Access to and use of information as indicated in eFOI. You have requested for monthly satellite imagery of water hyacinth distribution in Laguna Lake from January 2017 to December 2020. While our aim is to provide information whenever possible, please note that the available data in terms of the water hyacinth distribution in Laguna de Bay covers the months of September and November 2020 only, herewith attached. Please note that analysis on water hyacinth distribution using remote sensing data and GIS was only initiated last September 2020. Landsat 8 OLI and Sentinel 2 images that were used to map the water hyacinth distribution are freely available from the USGS Earth Explorer and Copernicus Open Access Hub, respectively. Other requested information related to Water Quality Parameters was forwarded to the concerned Division and will be provided accordingly, should they have any available data. You may also want to check the following for other supplemental information that may help you in your study: 1. LLDA E-Library for other relevant information - https://llda.gov.ph/ 2. LLDA Annual Reports - https://llda.gov.ph/annual-report/ Very truly yours, - Project Development, Management and Evaluation Division Laguna Lake Development Authority National Ecology Center, East Avenue, Diliman, Quezon City Tel. No. (02) 8332-2341 loc. 135

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