Faculty of Arts and Social Sciences
Faculty Profiles

National University of Singapore
10 Kent Ridge Crescent, Singapore 119260

Office: AS2-04-21
Email: geoadz@nus.edu.sg
Tel: +65 6516 6640
Homepage: http://www.adziegler.com/
| Brief Introduction | Teaching Areas | Current Research | Research Interests | Publications | Links

Brief Introduction Top

My research addresses the interactions of physical, ecological, and human systems, with water resources serving as a common nexus.  My work typically involves developing environmental monitoring programs that facilitate understanding catchment processes, as they vary both naturally and anthropogenically over different spatial and temporal scales. One current research focus area is determining if intensive agrarian systems on sloping lands in SE Asia are environmentally sustainable in terms of water availability, water quality, land degradation processes (e.g., erosion, landslides), biodiversity, and carbon sequestration.  In particular, how does the environmental footprint of intensified systems, such as permanent cultivation, greenhouse agriculture, and monoculture plantations of rubber and oil palm, compare with that of traditional swidden practices? Two other emerging focus areas are (1) determining the extent of co-facilitation among of mangroves, seagrass, and coral ecosystems; and (2) modeling the aquatic/riparian habitats associated with fish and snail host species of parasitic diseases in SE Asia. 

Teaching Areas Top

GE3230: Field studies (set in Thailand). 
GE4211: Catchment processes and management 
GE4880: Topics in geomorphology 
GE5211: Dynamic environments 

Current Research Top

Ziegler, AD, Sunsanee Rajchagool (Intercountry Centre for Oral Health, ICOH). Origin and consequences of high fluoride concentrations in ground water wells in the Chiang Mai and Lamphun areas of northern Thailand. Monsoon Foundation ($25,000): Thailand

Ziegler, AD (PI), RJ Wasson. 2012-2013. FASS Faculty Research Support Scheme. Singapore Ministry of Education (MOE) Academic Research Fund (AcRF) Tier 1 (c-109-000-222-091) (S$5785): Singapore.

Ziegler, AD (PI). 2012-2013. FRA Excellent Researcher Award (R-109-000-131-133). Faculty of Arts and Social Sciences ($4132): Singapore.

Ziegler, AD (PI). Anthropogenic and Natural Controls on Stream Chemistry at Multiple Scales. Ministry of Education (MOE) Academic Research Fund (AcRF, R-109-000-134-112), Singapore ($387,982): Thailand.

HU Jiangyong, Chew Soon Hoe; Ong Bee Lian; Chui Ting Fong, May; Lim Han She; Alan D. Ziegler; Lee Lai Yoke 2011-2014. Noble bioretention systems development for sustainable stormwater management (Public Utilities Board: $269,000): Singapore (tentatively accepted as of August, 2011).

DL Higgitt (PI, NUS), M Chui (NUS), AD Ziegler (NUS), Lim HS (NUS), R Wasson (Charles Darwin, Australia), G Brierly (U Auckland). 2011-2013. River Rehabilitation: An integrated approach to flood hazard management in Asian cities. NUS Global Asia Institute ($178,862): Singapore, China, India.

Ziegler AD (PI, NUS), PA Todd (PI, NUS), T Bouma (PI, NIOO-CEME), PMJ Herman (NIOO-CEME). 2009-2012. Towards designing innovative coastal protection using ecosystem-based approaches; deriving underlying ecological knowledge. SDWI/Eco-Shape/Building with Nature grant (R-303-001-020-414), Singapore & The Netherlands ($476,680): Thailand.

Fox, JM (PI, E/W Center, Hawaii), TW Giambelluca (Co-PI, UHM), Qi Chen (Co-PI , UHM), AD Ziegler (Co-PI, UHM). The expansion of rubber and its implications for water and carbon dynamics in Montane Mainland Southeast Asia. 2008-2012. NASA project #NNX08AL90G ($960,000): Laos, Thailand, Cambodia

Research Interests Top

Water-borne diseases
Earth surface processes
Monsoon areas & tropical environments
Impacts of land-cover & land-use change in SE Asia
Interactions between people and the physical environment

Publications Top



    Short Communications (7 listed on ISI Web of Science and/or Scopus)

    Sithithaworn, P, AD Ziegler, AD, Grundy-Warr, RH Andrews, T Petney. 2012. Alterations to the lifecycle of liverflukes: dams, roads, and ponds. The Lancet Infectious Disease 12(8): 588.

    Sidle RC, AD Ziegler. 2012. The dilemma of mountain roads. Nature Geoscience 5, 437–438

    Webb, EL, J Phelps, DA Friess, M Rao, AD Ziegler. 2012. Environment friendly reform in Myanmar. Science 336: 295.

    Ziegler, AD, HS Lim, NR Jachowski, RJ Wasson. 2012. Reduce urban flood vulnerability. Nature 481, 145.

    Ziegler, AD, RH Andrews, C Grundy-Warr, P Sithithaworn, TN Petney. 2011. Fighting liverflukes with food safety education. Science 331: 282-283.

    Ziegler, AD, PP Wong, C Grundy-Warr. 2009 Still vulnerable to killer tsunamis. Science 326: 1188-1189.

    Ziegler, AD, JM Fox, J Xu. 2009. The rubber juggernaut. Science 324: 1024-1025.

    Internationally Refereed Journal Publications (74 listed on ISI Web of Science and/or Scopus)

    Nanko, K, TW Giambelluca, RA Sutherland, R Mudd, M Nullet, AD. Ziegler. 2013. Erosion potential under Miconia calvescens stands on the Big Island of Hawai‘i. Land Degradation and Development DOI: 10.1002/ldr.220.

    Sen, OL, JM Fox, JB Vogler, TW Giambelluca, AD Ziegler 2012. Hydro-climatic effects of future land-cover/land-use change in montane mainland southeast Asia. Climatic Change ##: ##-##.

    LI, S, XX Lu, M He, Y Zhou, AD Ziegler. 2012. Daily CO2 partial pressure and CO2 outgassing in the upper Yangtze River basin: a case study of the Longchuan River, China. Journal of Hydrology 466-467: 141-150.

    Lim HS, K Boochaphun, Ziegler, AD. 2012. Modifiers and Amplifiers of High and low Flows on the Ping River in Northern Thailand (1921-2009): The Roles of Climatic Events and Anthropogenic Activity. Water Resources Management 26 (14): 4203-4224

    Ziegler AD, J Phelps, Yuen JQ, D Lawrence, EL Webb, TB Bruun TB, C Ryan, S Leisz, O Mertz, U Pascual, LP Koh, W Dressler, JM Fox, C Padoch. 2012. Carbon outcomes of major land-cover transitions in SE Asia: Great uncertainties and REDD+ policy implications. Global Change Biology 18: 3087-3099.

    Sutherland RA, FMG Tack, AD Ziegler 2012. Road-deposited sediments in an urban environment: A first look at sequentially extracted element loads in grain size fractions. Journal of Hazardous Materials 225–226: 54– 62.

    Lu, XX, S Li, M He, Y Zhou, R Bei, Li Li, AD Ziegler. 2012. Organic carbon fluxes from the upper Yangtze River basin: An example of the Longchuanjiang, China. Geomorphology 11: 1604–1616.

    Van Vliet, N, O Mertz, A Heineman, T. Langanke, U. Pascual, B Schmook, C. Adams, D. Schmidt-Vogt, P. Messerli, S Leisz, J-C, Castella, L Lrogensen, T Brich-Thomsen, C Hett, T Bech-Bruun, A Ickowitz, Kim Chi Vu, K. Yasuyuki, JM Fox, C Padoch, W, Dressler, AD Ziegler. Trends, drivers and impacts of changes in swidden agriculture on tropical forest frontiers: a global assessment. Global Environmental Change 22(2): 418-429

    Chang T-Y, Y-C Wang, C-C, Feng, AD Ziegler, TW Giambelluca, Liou, Y-A. 2012. Estimation of Root Zone Soil Moisture using Apparent Thermal Inertia with MODIS Imagery over the Tropical Catchment of Northern Thailand. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 99:1-11.

    Fox, FM, JB Vogler, OL Sen, TW Giambelluca, AD Ziegler. 2012. Simulating land-cover change in Montane Mainland Southeast Asia. Environmental Management 49(5): 968-979.

    Ziegler, AD, HS Lim, C Tantasarin, N Jachowski, RJ Wasson. 2012. Floods, False Hope, and the Future. 2012. Hydrological Processes 26: 1748-1750.

    Yuen, JQ, P Olin, HS Lim, SG Benner, RA Sutherland, AD Ziegler. 2012. Accumulation of potentially toxic elements in road deposited sediments in residential and light industrial neighborhoods in Singapore. Journal of Environmental Management 101: 151-163.

    Petney, T, P Sithithaworn, R Andrews, N Kiatsopit, S Tesana, C Grundy-Warr, AD Ziegler. 2012. Ecology of the Bithynia first intermediate hosts of Opisthorchis viverrini: a critical review. Parasitology Internat 61: 38-45.

    Grundy-Warr, C., RH Andrews, P Sithithaworn, TN Petney, B Sripa, L Lathavewat, AD Ziegler. 2012. Raw Attitudes, Wetland Cultures, Life-Cycles: Socio-cultural dynamics relating to Opisthorchis viverrini in the Mekong Basin. International Journal of Parasitology 61: 65-70.

    Ziegler, AD., RC Sidle, MS Song, JZ Ang, D Duangnamon. 2012. Slope Failures and Erosion on the Ao Jak Beach Road: Toward Reducing Tsunami Vulnerability on Remote Coastlines. Geological Society, London, Special Publications 361: 107-114.

    Lu, XX., S Li, M He, Y Zhou, RT Bei, AD Ziegler. 2011. Seasonal changes of nutrients in the Upper Changjiang basin: An example of the Longchuanjiang River, China. J. Hydrology 405: 344-351.

    Ziegler, AD, JM Fox, EL Webb, C Padoch, S Leisz, RA Cramb, O Mertz, TT Bruun, Tran Duc Vien. 2011. Recognizing Contemporary Roles of Swidden Agriculture in Transforming Landscapes of Southeast Asia. Conservation Biology 25: 846-848.

    Cuo, L, TW Giambelluca, AD Ziegler. 2011. Distributed-Hydrology-Soil-Vegetation Model Parameter Sensitivity Analysis. Hydrological Processes 25: 2405-2421.

    Li S, Lu XX, He Min, Zhou Y, Ziegler AD. 2011. Major element chemistry in the Upper Yangtze River: A case study of the Longchuanjiang River. Geomorphology: 129: 29-42.

    Guardiola-Claramonte, M, PA Troch, AD Ziegler, TW Giambelluca, M Durcik, JB Vogler, MA Nullet. 2010. Modeling basin-scale hydrologic effects of rubber (Hevea brasiliensis) in a tropical catchment. Ecohydrology. 3(3): 306-314.

    Sidle RC, AD Ziegler. 2010. Elephant trail runoff and sediment dynamics in northern Thailand. Journal of Environmental Quality: 39-871–881.

    Rerkasem, K, D Lawrence, C Padoch, D. Schmidt-Vogt, AD Ziegler. 2009. Consequences of swidden transitions for crop and fallow biodiversity. Human Ecology 37: 347-360.

    Ziegler, AD, TB Bruun, M Guardiola-Claramonte, TW Giambelluca, D Lawrence, Nguyen Thanh Lam. 2009. Environmental Consequences of the Demise in Swidden Agriculture in SE Asia: Hydrology and Geomorphology. Human Ecology 37: 361-373.

    Bruun, TB, A De Neergaard, D Lawrence, AD Ziegler. 2009. Environmental Consequences of the Demise in Swidden Agriculture in SE Asia: Soil Nutrients and carbon stocks. Human Ecology 37: 375-388.

    Ziegler, AD, RA Sutherland. 2009. Modeling soil flux by manual tillage as a non-linear slope-dependent process. Soil Science Society of American Journal 73 (3): 1012-1019.

    Ziegler, AD, TW Giambelluca, MA Nullet, RA Sutherland, C Tantasarin, JB Vogler, JN Negishi. 2009. Throughfall in an evergreen-dominated forest stand in northern Thailand: comparison of mobile and stationary methods. Agriculture and Forest Meteorology 149: 373 – 384.

    Cuo, L., TW Giambelluca, AD Ziegler, MN Nullet. 2008. The roles of roads and agricultural land use in altering hydrological processes in Nam Mae Rim watershed, northern Thailand. Hydrological Processes 22: 4339-4354.

    Wood, SH, AD Ziegler, T Bundarnsin. 2008. Floodplain sedimentation, channel changes and riverbank stratigraphy of the Mekong River area, Chiang Saen, northern Thailand. Geomorphology 101: 510-523.

    Wood, SH, AD Ziegler. 2008. Floodplain sediment from recent 50-year-recurrence floods of the Ping River in northern Thailand. Hydrology and Earth Systems Science 12: 959-973.

    Guardiola-Claramonte, M, PA Troch, AD Ziegler, TW Giambelluca, JB Vogler, MA Nullet. 2008. Local hydrologic effects of introducing non-native vegetation in a tropical catchment. Ecohydrology 1: 13-22.

    Negishi JN, RC Sidle, AD Ziegler, S Noguchi, Abdul Rahim Nik. 2008. Contribution of intercepted subsurface flow to road runoff and sediment transport in a logging-disturbed tropical catchment. Earth Surface Processes & Landforms 33: 1174-1191.

    Ziegler, AD, JN Negishi, RC Sidle, T Gomi, S Noguchi, Abdul Rahim Nik. 2007. Persistence of road runoff generation in a logged catchment in Peninsular Malaysia. Earth Surface Process & Landforms 32: 1947–1970.

    Sidle, RC, AD Ziegler, JB Vogler. 2007. Contemporary changes in surface area of Inle Lake, Myanmar. Sustainability Science DOI 10.1007/s11625-006-0020-7 41. Ziegler, AD, TW Giambelluca, RA Sutherland, MA Nullet, Tran Duc Vien. 2007. Soil translocation by weeding on swidden fields in northern Vietnam. Soil and Tillage Research 96: 219-233;

    Sutherland, RA, AD Ziegler. 2007. Effectiveness of Coir-based Rolled Erosion Control Systems in Reducing Sediment Transport from Hillslopes. Applied Geography 27: 150-164.

    Ziegler, AD, TW Giambelluca, D Plondke, S Leisz, LT Tran, J Fox, MA Nullet, JB Vogler, Dao Minh Truong, Tran Duc Vien. 2007. Hydrological consequences of landscape fragmentation in mountainous northern Vietnam: Buffering of accelerated overland flow. Journal of Hydrology 337: 52-67.

    Negishi JN, S Noguchi, RC Sidle, AD Ziegler, Abdul Rahim Nik. 2007. Storm flow generation including soil pipes in a tropical zero-order basin of Peninsular Malaysia. Hydrological Processes 21: 789-806.

    Ziegler, AD, JN Negishi, RC Sidle, S Noguchi, Abdul Rahim Nik. 2006. Impacts of logging disturbance on saturated hydraulic conductivity in a tropical forest in peninsular Malaysia. Catena 67: 89-102.

    Sutherland, RA, AD Ziegler. 2006. Hillslope runoff and erosion as affected by rolled erosion control systems: A field study. Hydrological Processes 20: 2830-2855.

    Sidle, RC, M Tani, AD Ziegler. 2006. Catchment processes in Southeast Asia: atmospheric, hydrologic, erosion, nutrient cycling, and management effects. Forest Ecology & Management 224: 1-4.

    Cuo, L, TW Giambelluca, AD Ziegler, MA Nullet. 2006. Using Distributed-Hydrology-Soil-Vegetation Model to study road effects on stream flow and soil moisture. Forest Ecol & Manage 224: 81-94.

    Ziegler, AD, LT Tran, TW Giambelluca, RC Sidle, RA Sutherland. 2006. Effective slope lengths for buffering hillslope surface runoff in fragmented landscapes in northern Vietnam. Forest Ecol & Manage 224: 104-118.

    MacNamara, JP, AD Ziegler, SH Wood, JB Vogler. 2006. Channel head locations with respect to geomorphologic thresholds derived from a digital elevation model: a case study in a tropical montane watershed in Northern Thailand. Forest Ecol & Manage 224: 147-156.

    Sidle, RS, AD Ziegler, JN Negishi, N Abdul Rahim, R Siew. 2006. Erosion processes in steep terrain–truths, myths, and uncertainties related to forest management in SE Asia. Forest Ecol & Manage 224: 199-225.

    Ziegler, AD JN Negishi, RC Sidle, P Preechapanya, RA Sutherland, TW Giambelluca, S Jaiaree. 2006. Reduction of stream suspended sediment concentration by a riparian buffer: filtering of road runoff. Journal of Environmental Quality 35: 151-162.

    Ziegler, AD, RA Sutherland. 2006. Effectiveness of a coral surfacing in reducing sediment production on unpaved roads, Schoffield Barracks, Oahu, Hawaii. Environmental Management 37: 98-110.

    Ziegler, AD, EP Maurer, J Sheffield, B Nijssen, EF Wood, DP Lettenmaier. 2005. Detection Time for Predicted Warming-Induced Changes in Precipitation, Evaporation, and Streamflow in Three Mississippi River Sub-basins. Climatic Change 72: 17–36.

    Ziegler, AD, TW Giambelluca, RA Sutherland, MA Nullet, S Yarnasarn, J Pinthong, P Preechapanya, S Jaiaree. 2004. Toward Understanding the Cumulative Impacts of Roads in Agricultural Watersheds of Montane Mainland Southeast Asia. Agriculture Ecosystems and Environment 104: 145–158.

    Sheffield, J, AD Ziegler, EF Wood, Y Chen 2004. Correction of the high-latitude rain day anomaly in the NCEP/NCAR reanalysis for land surface hydrological modeling. Journal of Climate 17(19): 3814-3828.

    Sutherland, RA, FMG Tack, AD Ziegler, JO Bussen. 2004. Metal Extraction from Road Sediments Using Nine Partial Decomposition Procedures. Applied Geochemistry 19:947-955. doi:10.1016/j.apgeochem.2003.11.002

    Ziegler, AD, TW Giambelluca, LT Tran, TT Vana, MA Nullet, JM Fox, TD Vien, J Pinthong, JF Maxwell, S Evett. 2004. Hydrological Consequences of Landscape Fragmentation in Mountainous Northern Vietnam: Evidence of Accelerated Overland Flow Generation. Journal of Hydrology 287: 124–146.

    Giambelluca, TW, AD Ziegler, MA Nullet, TM Dao, LT Tran. 2003. Transpiration in a small tropical forest patch. Agriculture and Forest Meteorology 117: 1-22.

    Ziegler, AD, J Sheffield, EP Maurer, B Nijssen, EF Wood, DP Lettenmaier. 2003. Detection of Intensification of Continental-Scale Hydrological Cycles: Temporal Scale of Evaluation. Journal of Climate 16(3): 535-547.

    Ziegler, AD, TW Giambelluca, RA Sutherland. 2002. Improved method for modeling sediment transport on unpaved roads using KINEROS2 and dynamic erodibility. Hydrological Processes 16(15): 3079-3089.

    Ziegler, AD, RA Sutherland, TW Giambelluca. 2001. Acceleration of Horton overland flow & erosion by footpaths in an agricultural watershed in Northern Thailand. Geomorphology 41: 249-262.

    Ziegler, AD, TW Giambelluca, RA Sutherland, TT Vana, MA Nullet. 2001. Contribution of Horton overland flow contribution to runoff on unpaved mountain roads in northern Thailand. Hydrol Process 15: 3203-3208.

    Sutherland, RA, JO Bussen, DL Plondke, BM Evans, AD Ziegler. 2001. Hydrophysical degradation associated with hiking trail use: a case study of Hawai`iloa Ridge Trail, Oahu, Hawai`i. Land Degrad & Devel 12: 71-86.

    Ziegler, AD, TW Giambelluca, RA Sutherland. 2001. Erosion Prediction on Unpaved Mountain Roads in Northern Thailand: I. Validation of Dynamic Erodibility Modeling using KINEROS2. Hydrol Process 15:337-358.

    Ziegler, AD, RA Sutherland, TW Giambelluca. 2001. Interstorm surface preparation and sediment detachment by vehicle traffic on unpaved mountain roads. Earth Surface Process & Landforms 26(3): 235-250.

    Ziegler, AD, RA Sutherland, TW Giambelluca. 2000. Partitioning total erosion on unpaved roads into splash and hydraulic components: the roles of inter-storm surface preparation and dynamic erodibility. Water Resources Research 36 (9): 2787-2791.

    Giambelluca, TW, MA Nullet, AD Ziegler, LT Tran. 2000. Latent and sensible heat flux over deforested areas in Amazonia and northern Thailand. Singapore Journal of Tropical Geography 21(2): 107-130.

    Ziegler, AD, SD Warren, JL Perry, TW Giambelluca. 2000. Reassessment of revegetation strategies for Kaho`olawe Island, Hawai`i. Journal of Range Management 53(1): 106-112.

    Ziegler, AD, RA Sutherland, TW Giambelluca. 2000. Runoff generation and sediment transport on unpaved roads, paths, & agricultural land surfaces in northern Thailand. Earth Surf Process & Landforms 25: 519-534

    Ziegler, AD, TW Giambelluca. 1998. The influence of revegetation efforts on hydrologic response and erosion, Kaho`olawe Island, Hawai`i. Land Degradation and Development 9:189-206.

    Ziegler, AD, RA Sutherland. 1998. The effect of an anionic soil conditioner on water stable aggregation of three Hawaiian soils. Communications in Soil Science & Plant Analysis 29: 1253-1264.

    Ziegler, AD, RA Sutherland. 1998. Reduction in interrill sediment transport by rolled erosion control systems. Soil and Tillage Research 45: 265-278.

    Sutherland, RA, AD Ziegler. 1998. The influence of the soil conditioner 'Agri-SC' on splash detachment and aggregate stability. Soil and Tillage Research 45: 373-387.

    Sutherland, RA, AD Ziegler. 1997. A new approach to determining water stable aggregation. Communications in Soil Science and Plant Analysis 28 (19&20): 1871-1887.

    Ziegler, AD, RA Sutherland, LT Tran. 1997. Influence of rolled erosion control systems on temporal splash response—an interrill laboratory rainfall simulation experiment. Land Degradation & Develop 8: 139-157.

    Ziegler, AD, TW Giambelluca. 1997. Importance of rural roads as source areas for runoff in mountainous areas of northern Thailand. Journal of Hydrology 196 (1/4): 204-229.

    Giambelluca, TW, D Hölscher, TX Bastos, RR Frazão, M Nullet, AD Ziegler. 1997. Observations of albedo and radiation balance over post-forest land surfaces in the eastern Amazon Basin. J Climate 19(5): 919-928.

    Giambelluca, TW, LT Tran, AD Ziegler, TP Menard, M Nullet. 1996. Soil-vegetation-atmosphere processes: Simulation and field measurements for deforested sites in northern Thailand. Journal of Geophysical Research 101 (D20): 25,867-25,885.

    Sutherland, RA, Y Wan, C-T Lee, AD Ziegler. 1996. Aggregate enrichment ratios for splash and wash transported sediment from a highly weathered tropical Oxisol. Catena 26: 187-208.

    Sutherland, RA, Y Wan, AD Ziegler, C-T Lee, SA El-Swaify. 1996. Splash and wash dynamics: an experimental investigation using a highly weathered tropical Oxisol. Geoderma 69: 85-103.

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