2022_Temporal Pattern in Soil Water Content And Evapotranspiration in Lowland Tropical Forest, Pasoh Forest Reserve
| Format: | General Document |
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| collectionurl | https://intelek.unisza.edu.my/intelek/pages/search.php?search=!collection3 |
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| country | Malaysia |
| date | 2022-10-06 |
| format | General Document |
| id | 15650 |
| institution | UniSZA |
| internalnotes | Sila masukkan subject wajib Dissertations, Academic untuk semua tesis.. Terima kasih |
| originalfilename | 15650_ab93125b6f9532f.pdf |
| person | Noor Atiqah Binti Badaluddin |
| recordtype | oai_dc |
| resourceurl | https://intelek.unisza.edu.my/intelek/pages/view.php?ref=15650 |
| sourcemedia | Server storage Scanned document |
| spelling | 15650 https://intelek.unisza.edu.my/intelek/pages/view.php?ref=15650 https://intelek.unisza.edu.my/intelek/pages/search.php?search=!collection3 General Document Malaysia Library Staff (Top Management) Library Staff (Management) Library Staff (Support) Terengganu Faculty of Bio-resources & Food Industry English application/pdf 1.5 Server storage Scanned document Universiti Sultan Zainal Abidin UniSZA Private Access UNIVERSITI SULTAN ZAINAL ABIDIN SAMBox 2.3.4; modified using iTextSharp™ 5.5.10 ©2000-2016 iText Group NV (AGPL-version) 120 Copyright©PWB2025 2022-10-06 15650_ab93125b6f9532f.pdf Noor Atiqah Binti Badaluddin 2022_Temporal Pattern in Soil Water Content And Evapotranspiration in Lowland Tropical Forest, Pasoh Forest Reserve Soil moisture – Temporal variations Evapotranspiration Soil moisture, also known as soil water, is an important component of the three-phase soil system, which includes soil minerals, moisture, and air vapor. Evapotranspiration (ET) is a combined process of evaporation from uncovered soil and exposed water, and transpiration from plants through stomata. Understanding the individual processes in the forest ecosystem that are affected by prolonged drought is crucial, especially for the Pasoh tropical forest, the driest region in Peninsular Malaysia. Therefore, the objectives of this study are 1) to determine the temporal soil water content in the Pasoh tropical forests, 2) to investigate the relationship between soil water content and evapotranspiration in the forest environment, and 3) to establish spectral indices for estimating soil water content based on satellite remote sensing data. Pasoh Forest Reserve was selected as the study area due to its annual rainfall. The study was conducted using field and satellite remote sensing data from 2019 to 2020. Meteorological variables such as rainfall, Volumetric Soil Water Content (VSWC) and vapor pressure difference were recorded by the sensors located at the flux tower. For remote sensing data, a high-resolution Worldview-2 satellite image with eight multispectral bands was retrieved. Spectral information based on the Normalized Difference Vegetation Index (NDVI) and the Soil Moisture Index (SMI), which are used in the calculation of soil moisture, improves the knowledge the effects of drought on forest ecosystems. All statistical analyses were evaluated with Principal Component Analysis (PCA). Rainfall varies throughout the season as Malaysia experiences a weak El Niño event in late 2019 and an early La Niña phase in mid to late 2020. In 2020, an annual rainfall of 2004.28 mm was recorded while in 2019, 1357.85 mm was recorded. During the 13-month study period, the heaviest rainfall occurred in October 2019 and the least in February 2019, 364.70 mm and 3.20 mm respectively. The water content of the soil responded positively to the rainfall. In the uppermost soil horizon, the range of soil moisture is 10% to 25%, and the deeper the soil becomes, the higher the soil moisture. ET shows a stable value, ranging from 3.32 mm to 3.98 mm during the study periods. On satellite images, healthy vegetation absorbs most of the visible light that hits it and reflects much of the near-infrared light. The surface of forests and oil palms showed different intensity values across the spectrum because they have different surfaces. Therefore, band composites can delineate the respective composite spectral signature. In conclusion, the results of this study will archive the data of Pasoh FR for international reference and can serve as a model for other forests to study the response of tropical forests to climate change and global warming. Dissertations, Academic Sila masukkan subject wajib Dissertations, Academic untuk semua tesis.. Terima kasih Temporal Patterns Soil Water Content Thesis |
| spellingShingle | 2022_Temporal Pattern in Soil Water Content And Evapotranspiration in Lowland Tropical Forest, Pasoh Forest Reserve |
| state | Terengganu |
| subject | Soil moisture – Temporal variations Dissertations, Academic |
| summary | Soil moisture, also known as soil water, is an important component of the three-phase soil system, which includes soil minerals, moisture, and air vapor. Evapotranspiration (ET) is a combined process of evaporation from uncovered soil and exposed water, and transpiration from plants through stomata. Understanding the individual processes in the forest ecosystem that are affected by prolonged drought is crucial, especially for the Pasoh tropical forest, the driest region in Peninsular Malaysia. Therefore, the objectives of this study are 1) to determine the temporal soil water content in the Pasoh tropical forests, 2) to investigate the relationship between soil water content and evapotranspiration in the forest environment, and 3) to establish spectral indices for estimating soil water content based on satellite remote sensing data. Pasoh Forest Reserve was selected as the study area due to its annual rainfall. The study was conducted using field and satellite remote sensing data from 2019 to 2020. Meteorological variables such as rainfall, Volumetric Soil Water Content (VSWC) and vapor pressure difference were recorded by the sensors located at the flux tower. For remote sensing data, a high-resolution Worldview-2 satellite image with eight multispectral bands was retrieved. Spectral information based on the Normalized Difference Vegetation Index (NDVI) and the Soil Moisture Index (SMI), which are used in the calculation of soil moisture, improves the knowledge the effects of drought on forest ecosystems. All statistical analyses were evaluated with Principal Component Analysis (PCA). Rainfall varies throughout the season as Malaysia experiences a weak El Niño event in late 2019 and an early La Niña phase in mid to late 2020. In 2020, an annual rainfall of 2004.28 mm was recorded while in 2019, 1357.85 mm was recorded. During the 13-month study period, the heaviest rainfall occurred in October 2019 and the least in February 2019, 364.70 mm and 3.20 mm respectively. The water content of the soil responded positively to the rainfall. In the uppermost soil horizon, the range of soil moisture is 10% to 25%, and the deeper the soil becomes, the higher the soil moisture. ET shows a stable value, ranging from 3.32 mm to 3.98 mm during the study periods. On satellite images, healthy vegetation absorbs most of the visible light that hits it and reflects much of the near-infrared light. The surface of forests and oil palms showed different intensity values across the spectrum because they have different surfaces. Therefore, band composites can delineate the respective composite spectral signature. In conclusion, the results of this study will archive the data of Pasoh FR for international reference and can serve as a model for other forests to study the response of tropical forests to climate change and global warming. |
| title | 2022_Temporal Pattern in Soil Water Content And Evapotranspiration in Lowland Tropical Forest, Pasoh Forest Reserve |
| title_full | 2022_Temporal Pattern in Soil Water Content And Evapotranspiration in Lowland Tropical Forest, Pasoh Forest Reserve |
| title_fullStr | 2022_Temporal Pattern in Soil Water Content And Evapotranspiration in Lowland Tropical Forest, Pasoh Forest Reserve |
| title_full_unstemmed | 2022_Temporal Pattern in Soil Water Content And Evapotranspiration in Lowland Tropical Forest, Pasoh Forest Reserve |
| title_short | 2022_Temporal Pattern in Soil Water Content And Evapotranspiration in Lowland Tropical Forest, Pasoh Forest Reserve |
| title_sort | 2022_temporal pattern in soil water content and evapotranspiration in lowland tropical forest, pasoh forest reserve |