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? Other emerging focus areas are (1) determining the extent of co-facilitation among of mangroves, seagrass, and coral ecosystems; (2) modelling environmental processes with artificial intelligencemodels; and (3) examining the linkage between hydrological processes, infectious disease, and human health in developing countries.
1993 - 2000 PhD, Geography, University of Hawai`i, Honolulu, Hawai`i, USA
1988 - 1991 MA, Geography, University of Kansas, Lawrence, Kansas, USA
1985 - 1988 BS, Mathematics & Computer Science, University of Kansas, USA
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
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 (DOI: 10.1111/j.1365-2486.2012.02747.x): 1-13.
Ziegler, AD, HS Lim, 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, JM Fox, Webb, EL, C Padoch, et al. 2011. Rapid land use changes and the role of swiddening in SE Asia. Conservation Biology 25: 846-848.
Ziegler, AD., PP Wong, C Grundy-Warr. 2009 Still vulnerable to killer tsunamis. Science 326: 1188-1189.
Ziegler, AD., JF Fox, JC Xu. 2009. The rubber juggernaut. Science 324: 1024-1025.
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 Processes & Landforms 32: 1947-1970.
Ziegler, AD, JN Negishi, RC Sidle, P Preechapanya, RA Sutherland, TW Giambelluca, S Jaiarree. 2006. Reduction of stream suspended sediment concentration by a riparian buffer: filtering of road runoff. Journal of Environmental Quality 35: 151-162.
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: 535-547.
Ziegler, AD, TW Giambelluca, RA Sutherland. 2002. Improved method for modeling sediment transport on unpaved roads using KINEROS2 and dynamic erodibility. Hydrological Processes16: 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. 1997. Importance of rural roads as source areas for runoff in mountainous areas of northern Thailand. Journal of Hydrology (1/4): 204-229.
GE1101: GE 1101 Place, Space, and Society
GE3240: Geographical Research: Developing Ideas
GE4211: Catchment Processes and Management
GE4880: Topics in Geography
GE6770: Graduate Research Seminar
FASS Faculty teaching award: 2010; 2011; 2012
NUS Faculty of Arts and Social Science
Faculty Research Committee
Environmental Cluster Steering Committee Head
NUS Geography Department
Research Committee, deputy chair
Honors Coordinator & Level 4000 module coordinator
Tropical Environmental Cluster Deputy Chair
Ethics and Standards Sub-Committee