Kogila Vani Annammala

Kogila Vani Annammala
Universiti Teknologi Malaysia | UTM · Department of Water and Environmental Engineering.School Of Civil. Faculty of Civil Engineering.

BSc(Hons), MSc, PHd

About

39
Publications
5,989
Reads
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229
Citations
Citations since 2016
23 Research Items
207 Citations
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
Additional affiliations
January 2010 - present
Swansea University
January 2004 - April 2015
Universiti Malaysia Sabah (UMS)
Position
  • Research Officer

Publications

Publications (39)
Article
Full-text available
Pristine tropical river systems are coming under increasing pressure from the development of economic resources such as forestry and mining for valuable elements. The Lebir catchment, north eastern Malaysia, is now under development as a result of unregulated tree felling and mining for essential and rare metals. Two sediment cores, one in the upst...
Article
Barium (Ba) isotope variations offer the potential to trace environmental processes, including long-term changes in river discharge and marine export production. Riverine inputs are an important source of dissolved Ba to the ocean, which we estimate to be ~10 to 20 Gmol yr⁻¹. A large fraction (~20 to 75%) of this net riverine dissolved Ba flux to t...
Article
Full-text available
This study seeks to identify sediment sources, quantify erosion rates, and assess water quality status via sediment fingerprinting, the Modified Laser Erosion Bridge (MLEB) method, and various pollution indices (PIs), respectively, in the humid tropics (Malaysia). Geochemical elements were used as tracers in sediment fingerprinting. Erosion rates w...
Article
Full-text available
The data provided in the article includes the sequence of bacterial 16S rRNA gene from a high conservation value for- est, logged forest, rubber plantation and oil palm plantation collected at Kelantan river basin. The logged forest area was previously notified as a flooding region. The total gDNA of bacterial community was amplified via polymerase...
Article
Full-text available
Johor Strait is an economically important freshwater system in the southern portion of Peninsular Malaysia. In past decades, Johor has been experiencing rapid developments especially in industrialisation, urbanisation and agricultural activities which have impacted the quality of Johor river. This study focused on identifying the intensity and degr...
Article
Full-text available
A rapid growth of agricultural plantations and climatic extremes have raised concerns pertaining to enhanced soil erosion. Soil erosion studies are still relatively limited in Malaysia. In this study, soil erosion in four sites such as high conservation value forests (HCVFs), logged forest (LF), mature oil palm (MOP), and mature rubber (MR) within...
Conference Paper
Full-text available
Fluvial sediment have been regarded as pervasive contaminants in many catchment systems around the world. This highlights the need for reliable a method of quantitative information acquisition on sediment sources to aid in proper mitigation actions. The sediment source fingerprinting approach is increasingly popular for identifying the origin of no...
Article
Full-text available
Early flood warnings are important to allow sufficient time for evacuation. Although warning systems are now in place, key questions remain as to their effectiveness in sending information to the public, which may in part depend on the media used. This paper assesses the effectiveness of warnings disseminated to the public for the December 2014 Kel...
Conference Paper
Soil erosion and sedimentation related issues have been widely highlighted as an environmental problem around the world. Especially in areas whereas intensive land-use change and disturbances are active. These highlights the needs of reliable quantitative information both on erosion rate estimation and sediment sources prediction to aid in proper m...
Poster
Full-text available
BACTERIAL DIVERSITY AS AN INDICATOR TO SOIL PERTURBATION IN THE KELANTAN RIVER BASIN RENNIELYN RUPERT1, GRACE JOY CHIN WEI LIE 1, KOGILA VANI ANNAMMALA 2 & KENNETH FRANCIS RODRIGUES1* Extensive logging and land conversion in Kelantan, Malaysia have significantly contributed to soil perturbation over the years. This has led to a change in the soil...
Chapter
Although there have been extensive studies on the hydrological and erosional impacts of logging, relatively little is known about the impacts of conversion into agricultural plantation (namely rubber and oil palm). Furthermore, studies on morphological impacts, sediment-bound chemistry and forensic attribution of deposited sediment to their respect...
Article
Full-text available
1.There is a weak evidence‐base supporting the effective management of riparian ecosystems within tropical agriculture. Policies to protect riparian buffers ‐ strips of non‐cultivated land alongside waterways – are vague and vary greatly between countries. 2.From a rapid evidence appraisal we find that riparian buffers are beneficial for hydrology,...
Article
Full Text: <https://authors.elsevier.com/a/1XqAQ_WGi1y8q> Although erosional impacts of rainforest logging are well established, changes in hydrological dynamics have been less explored especially in the post-logging recovery phase following repeat-logging cycles and mature phase of oil palm plantation cycles. This study addresses this gap by comp...
Conference Paper
Full-text available
Asia is the continent with highest sediment supply in the world, which results in adverse impact to the ecosystem. Amongst the regions in this continent, Southeast Asia has recorded as one of the highest sediment yield regions due to human activities on land uses. Considering to this sedimentation issues, sediment source fingerprinting approach has...
Article
Full-text available
Agriculture in Malaysia makes up to twelve percent of the nation’s GDP and is supplying one-third of the world rubber export. Ambitious agriculture demand increases the intensity of forest conversion which is driven to the soil erosion. Thus, this study is to measure and analyse the impact of forest conversion on soil erosion relate to some manipul...
Conference Paper
Full-text available
The last three decades have seen a combination of logging and land-use change across most of the rainforest tropics. This has involved conversion to oil palm across large parts of SE Asia. Although much is now known about the hydrological and sediment transport impacts of logging, relatively little is known about how impacts of oil palm conversion...
Data
Full-text available
Estuaries and sea-associated wetlands are the final destination for organic pollutants due to their chemical and physical properties. The current research studied Parai River and estuary adjacent to the southern South China Sea in Kota Kinabalu, Sabah. Six samples of surface sediment were taken during January 2012. The samples (top 3 cm) were extra...
Conference Paper
Full-text available
Enhanced suspended sediment transport, sedimentation, channel change and flooding are downstream conse- quences in large tropical catchments affected by upstream logging and land use change and recent increases in rainstorm magnitude-frequency. Sediment fingerprinting is based on comparisons of sediment properties of down- stream transported materi...
Article
Full-text available
The presence of carcinogenic compounds in the coastal waters was monitored to assess the health effects to human and the marine environment. The details on the level of hydrocarbon contamination in the coastal waters of some small islands and the port in Kota Kinabalu were provided to initiate the management and monitoring plan for ecosystem manage...
Data
Full-text available
Logging has been the main economic activity of some Southeast Asian countries until the last decade. Rainforest logging usually causes significant changes to soil properties (notably infiltration capacity and permeability; bulk density; ground cover by roots, leaf litter and vegetation) that contribute to greatly enhanced overland flow, stream flow...
Conference Paper
Full-text available
A modified erosion bridge technique is described and its performance evaluated. This point scale measurement method has utmost standard error of 1.1mm with maximum standard deviation value of 0.6mm. Research sites were Danum Valley (Primary forest), Malua Forest Reserve (Logged forest), forest fragments and within oil palm plantation in Sabahmas Es...
Data
The SAFE (Stability of Altered Forest Ecosystems) project located in the headwaters of the Brantian catchment in Sabah, is conducting one of the world’s largest ecological experiments to understand how logging, partial conversion to oil palm plantation and forest fragmentation affect the functioning of remaining tropical rainforests, impair their a...
Data
Enhanced sediment transport, sedimentation, channel change and downstream flooding in large tropical catchments often result from upstream land-use change and land management policies. These problems can be exacerbated by climatic change. This paper focuses on terrain of contrasting land-use in eastern Sabah, Malaysian Borneo. Differences in soil e...
Presentation
Full-text available
Multi-proxy sediment fingerprinting using changes in geochemical variables within downstream floodplain or lateral bench cores and relating them to differences in geochemical character of upstream tributary sediment inputs and/or down soil profiles, preferably in combination with dating using Pb-210 and Cs-137 or other markers, provides the potenti...
Conference Paper
Full-text available
The Stability of Altered Forest Ecosystems (SAFE) project is conducting one of the world's largest ecological experiments to understand how deforestation affects the functioning of tropical rainforests. The SAFE project has a hydrology component that focus primarily on the impacts of retaining riparian buffer zones of differing widths on stream cha...
Data
Full-text available
Data collec)on is one if the most essen)al part in research designs that ensures reliable results will be obtained. In regards to measurement of soil erosion, obtaining realis)c data on soil loss field measurements is the most cri)cal part. It is blasphemy to think that adop)ng whatever available erosion models and technologies can do the role of m...
Article
While rivers draining tropical rainforested catchments are considered to be relatively stable in terms of their hydrological regime, forest disturbance due to logging can lead to extreme, non-linear responses in both flow and sediment load. With growing concern regarding the downstream impacts of enhanced sediment loads and, in particular in tropic...
Conference Paper
Full-text available
The principal aim of the hydrological component of the Stability of Altered Forest Ecosystems (SAFE) Project is to assess the comparable benefits of riparian forest buffer zones of differing width in reducing adverse hydrological, erosional and pollutional impacts of conversion of previously rainforest landscapes to oil palm with forest. This paper...
Article
Full-text available
Long-term (21-30 years) erosional responses of rainforest terrain in the Upper Segama catchment, Sabah, to selective logging are assessed at slope, small and large catchment scales. In the 0.44 km(2) Baru catchment, slope erosion measurements over 1990-2010 and sediment fingerprinting indicate that sediment sources 21 years after logging in 1989 ar...
Article
Full-text available
Rain-forest vegetation is generally considered to be highly protective against erosion, but with disturbance via logging leading to major, but relatively short-lived increases in erosion for a 2-year period until rapid revegetation of slopes has occurred. This paper questions and re-assesses these views using a combination of long-term monitoring,...
Conference Paper
Full-text available
Soil erosion and sedimentation related issues have been widely highlighted as an environmental problem around the world. Especially in areas whereas intensive land-use change and disturbances are active. These highlights the needs of reliable quantitative information both on erosion rate estimation and sediment sources prediction to aid in proper m...

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