A5089267133- Hydrology and Watershed Management Studies
- Soil erosion and sediment transport
- Plant Water Relations and Carbon Dynamics
- Fire effects on ecosystems
- Soil Geostatistics and Mapping
- Cocoa and Sweet Potato Agronomy
- Tropical and Extratropical Cyclones Research
- Soil and Unsaturated Flow
- Botany and Plant Ecology Studies
- Flood Risk Assessment and Management
- Coastal wetland ecosystem dynamics
- Isotope Analysis in Ecology
- Peatlands and Wetlands Ecology
- Pacific and Southeast Asian Studies
- Hydrology and Sediment Transport Processes
- Soil Carbon and Nitrogen Dynamics
- Groundwater and Watershed Analysis
- Seedling growth and survival studies
- Coffee research and impacts
- Hydrology and Drought Analysis
- Urban Stormwater Management Solutions
- Climate variability and models
- Landslides and related hazards
- Forest ecology and management
- Soil Management and Crop Yield
University of the West Indies
2018-2025
Western University
2013-2015
University of Waterloo
2009
Abstract In forested catchments, the exceedance of rainfall and antecedent water storage thresholds is often required for runoff generation, yet to our knowledge these threshold relationships remain undescribed in tropical dry forest catchments. We, therefore, identified controls streamflow activation timing magnitude a catchment near Pacific coast central Mexico. During 52 day transition phase from wet season, soil movement was dominated by vertical flow which continued until moisture...
ABSTRACT Infiltration and hydraulic conductivity ( K ) play a key role in streamflow generation groundwater recharge. The impact of agriculture on soil infiltration has been widely investigated. While many studies show decreases , others an increase or no change both parameters. These variations highlight the importance conducting local scale investigations. We investigated agricultural development land cover changes . Unsaturated unsat was measured at surface during dry wet seasons,...
Abstract Following harvesting by manual block‐cut methods and subsequent abandonment, Cacouna bog has undergone a natural vegetation succession, with ericaceous shrubs covering more than 90% of the surface. The abundance plays major role in soil water flux availability at site, impacting Sphagnum regeneration. From June 1 to August 22, 2007, field measurements indicate that transpiration represented largest loss from 1·7 mm day −1 , comprising 142 (42%) rainfall, compared 93 evaporation...
Abstract Studies of hydrological processes in tropical dry forests are less than 1% published forest hydrology literature. The strong dry‐wet seasonality typical the ecoregion is similar to those that characterize semi‐arid regions. In systems, infiltration often limited by low hydraulic conductivities ( K ) and extreme levels soil water repellency, which when combined with high rainfall intensities, result excess (Hortonian) overland flow (HOF) as a dominant runoff mechanism. Given little...
Spatial heterogeneity is a universal phenomenon existing in ecological systems at all scales. In the humid tropics, soil sampling and characterization are complex due to high spatial variability. The inability of researchers capture this variability inhibits effective management resources terrestrial ecosystems. Hence, simple approaches that labor cost-efficient but generate representative samples required optimize characterization. paper, we used combination descriptive statistics...
Abstract Our understanding of the hydrological processes in cocoa agroforests is extremely limited. Most work has focused on characterising throughfall and transpiration under various management approaches climate change scenarios. However, little currently understood about how soil water movement driven by infiltration hydraulic conductivity. We monitored properties, repellency conductivity a 5‐, 12‐ >30‐year‐old plantation wet dry seasons. During season, repellent conditions were absent...
Soil water repellency is a major concern in many systems as it substantially reduces infiltration and enhances surface runoff. While recognised that affected by the soil organic matter natural ecosystems, impact of manure compost additions on development persistence agroecosystems, particularly tropics, poorly understood. We therefore examined different manure, temperature tropical soils. monitored change Cambisol (Talparo – clay loam), Acrisol (Piarco silt loam) Arenosol (Arena loamy sand),...
Abstract Soil texture is an important factor governing a range of physical properties and processes in soil. The clay fine fractions soil are particularly controlling water retention, hydraulic properties, flow transport. Modern analysis techniques (x‐ray attenuation, laser diffraction particle counting) very laborious with expensive instrumentation. Chilled‐mirror dewpoint potentiameters allows for the rapid measurement permanent wilting point (PWP) As PWP strongly dictated by texture, we...
Abstract Tropical cyclones (TCs) are one of the major natural hazards to island and coastal communities ecosystems. However, isotopic compositions TC‐derived precipitation (P) in surface water (SW) groundwater (GW) reservoirs still lacking. We tested three main assumptions isotope storm “spike” hypothesis (sudden spikes ratios). Our database covers 40 TCs is divided into recent ( N = 778; 2012–2023) archived 236; 1984–1995) rainfall observations SW/GW monitoring 6013; 2014–2023). Seasonal...
In cocoa agroforesty systems, shade trees are used to create climate conditions that benefit growth and survival. However, the benefits may be offset by competition between for water, especially in a changing climate.  Here we use stable isotope tracers quantify  the patterns depths of water uptake among timber trees, cocoa, banana tropical agroforestry system Trinidad. Rainfall was collected from August 2021 September 2023. Three field campaigns were carried out at an...
Our understanding of the hydrological processes in cocoa agroforests is extremely limited. Most work has focused on characterising throughfall and transpiration under various management approaches climate change scenarios. However, little currently understood about soil which serve as a link to transpiration. We monitored properties, water repellency hydraulic conductivity 5, 12 >30 year old plantation wet dry seasons. During season repellent conditions were absent all stands while showed...
Throughout the Caribbean, hillside quarrying has become a common practice. While these activities remove large sections of critical soil zone, very little work been done on how impacts rainfall runoff response and catchment water storage. We hypothesised that removal zone during will increase timing magnitude streamflow to storm events due its close proximity river, while also reducing overall storage watershed. The aim this study is understand landuse A paired between 3.6 km2 Acono...
<p>In many parts of the tropics, increased demand for cocoa and its products has led to development new plantations. The soil properties in these young plantations may differ from older or natural forests, which affect water flow. As trees are very shallow rooted, growth survival can be prone changes hydrology. We monitored properties, repellency hydraulic conductivity a 5, 12 >30 year old plantation. During dominant wet period, was absent all stands while showed no...
<p>Climate change and unsustainable land use practices such as quarrying have the potential to negatively impact hydrology water resource availability in catchments. Throughout Caribbean, hillside has become a common practice. While these activities remove large sections of critical zone, very little work been done on how impacts storm response catchment storage.  The study is particularly important given expected changes rainfall patterns Caribbean under future...