Christopher Wada
Identifying priority watershed management areas for groundwater recharge protection on Hawai‘i Island
This report provides an analysis of the relative effectiveness of watershed conservation and restoration efforts in terms of groundwater recharge benefits in Hawaiʻi County Department of Water Supply (DWS) priority aquifers and recharge areas. In Kohala, Kona, and Kaʻū. With financial support from DWS and the National Science Foundation, EPSCoR ʻIke Wai project, this study […]
Read MoreMountain-to-sea ecological-resource management: forested watersheds, coastal aquifers, and groundwater dependent ecosystems
Improving the understanding of connections spanning from mountain to sea and integrating those connections into decision models have been increasingly recognized as key to effective coastal resource management. In this paper, we aim to improve our understanding of the relative importance of linkages between a forested watershed, a coastal groundwater aquifer, and a nearshore marine […]
Read MoreDo Natural Disasters Make Sustainable Growth Impossible?
We consider the prospects for sustainable growth using expected utility models of optimal investment under threat from natural disasters. Adoption of a continuous time, stochastic Ramsey growth model over an infinite time horizon permits the analysis of sustainability under uncertainty regarding adverse events, including both one-time and recurrent disasters. As appropriate to small economies, we […]
Read MoreContributions of native forest protection to local water supplies in East Maui
Tropical forests provide a suite of benefits including biodiversity, cultural value, and a range of ecosystem services. Globally, there is increasing interest in incentivizing native forest protection as a multi-benefit natural infrastructure strategy to secure clean and ample water supplies. In addition to conversion to agriculture and other non-forest land uses, non-native species invasion represents […]
Read MoreCharacterizing Hawai‘i’s Natural Resources Management Sector
This report provides an update to the 2015 “Recent Trends in Hawai‘i’s Green Economy: Agriculture, Energy, and Natural Resource Management” publication, the second update since our original report in 2012. Hawai‘i’s natural resource management jobs were at least 4,697 in 2018, 33% higher than reported for 2014, which is equivalent to an annual growth rate […]
Read MoreRecovery of Lost Nexus Synergy via Payment for Environmental Services in Kumamoto, Japan
The objective of this study is to characterize and quantify the “trans-spatial nexus synergy” benefit of subsidized water ponding in the water-energy-food nexus in Kumamoto, Japan. After years of decreased rice production in upstream areas and associated declines in groundwater levels, the Kumamoto city government implemented a subsidy program whereby farmers in the Shira River […]
Read MoreIdentifying Areas of Cost-effective Watershed Management for Groundwater Recharge Protection on Hawai‘i island
In collaboration with the County of Hawai‘i Department of Water Supply (DWS), we identified three priority management areas on Hawai‘i Island: Kohala, Kona, and Kaʻū. These critical recharge areas were identified by DWS as important recharge areas for four aquifers where current withdrawals are near current or future sustainable yield limits: Mahukona, Waimea, Keauhou, and […]
Read MoreInterpreting Life-History Traits of Miconia (Miconia calvescens) through Management over Space and Time in the East Maui Watershed, Hawaii (USA)
Miconia (Miconia calvescens DC) was introduced to the East Maui Watershed (EMW) a half-century ago with more than 25 years of management recorded. Using a historical spatiotemporal data set, we constructed a dispersal kernel for miconia in the EMW. Seedbank persistence, based on postdated recruitment, displayed an exponential decay projecting extinction beyond 20 years. In […]
Read MoreBiocultural Restoration of Traditional Agriculture: Cultural, Environmental, and Economic Outcomes of Lo‘i Kalo Restoration in He‘eia, O‘ahu
There are growing efforts around the world to restore biocultural systems that produce food while also providing additional cultural and ecological benefits. Yet, there are few examples of integrated assessments of these efforts, impeding understanding of how they can contribute to multi-level sustainability goals. In this study, we collaborated with a community-based non-profit in He‘eia, […]
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