Effects of land-cover and watershed protection futures on sustainable groundwater management in a heavily utilized aquifer in Hawai‘i (USA)

Groundwater sustainability initiatives, including sustainable yield and watershed policy protection policies, are growing globally in response to increasing demand for groundwater, coupled with concerns about the effects of climate and land-cover change on groundwater supply. Improved understanding of the impacts of watershed management on groundwater yields and management costs—particularly in the broader context of climate and land-cover change—is critical to inform these initiatives and facilitate integrated land and water management. This study develops a novel, spatially explicit groundwater hydrologic ecosystem services framework, which combines stakeholder-defined land-cover scenarios, sustainable yield estimation using a groundwater simulation optimization approach, and economic valuation, and applies it in the most heavily utilized aquifer Hawai‘i (USA). Sustainable yield estimates and resulting differences in replacement costs are estimated for six land-cover scenarios (with varying levels of urban development and watershed management) crossed with two water demand scenarios in a context of a dry future climate (Representative Concentration Pathway [RCP] 8.5 mid-century). Land-cover change is found to be an important, though less significant drive of changes in groundwater recharge than climate change. The degree of watershed protection, through preventing the spread of high-water-use, invasive plant species, is projected to be a much stronger land-cover signal than urban development. Specifically, full forest protection increases sustainable yield by 7–11% (30–45 million liters per day) and substantially decreases treatment costs compared with no forest protection. Collectively, this study demonstrates the hydrologic and economic value of watershed protection in a context of a dry future climate, providing insights for integrated land and water policy and management in Hawai‘i and other regions, particularly where species invasions threaten source watersheds.

The first list of amphibians and reptiles from Soc Son watershed protection forest, Ha Noi City, Vietnam

Based on a new herpetological collection from four field surveys conducted in the Soc Son Watershed Protection Forest, Ha Noi City, from March 2017 to April 2018. We herein provide the first list of 42 species of amphibians and reptiles, in which, 12 species are newly recorded for the herpetofauna of Ha Noi City. In addition, morphological characters of these species are also provided. In terms of conservation concern, two species are listed in the IUCN Red List (2020), five species are listed in the Vietnam Red Data Book (2007), and two species are listed in the Governmental Decree No 06/2019/ND-CP.

The Wild and Scenic Rivers Act at 50: Overlooked Watershed Protection

The Wild and Scenic Rivers Act (WSRA) marked its fiftieth anniversary in 2018 without much fanfare. The WSRA has been somewhat overshadowed by the Wilderness Act, which preceded it by four years, and by the National Environmental Policy Act and the pollution control statutes which followed in the 1970s. But the WSRA was a significant conservation achievement, has now extended its protections to over 200 rivers, and has the potential to provide watershed protection to many more in the future. This article explains the statute and its implementation over the last half-century as well as a number of challenges to fulfilling its laudable goals of protecting free-flowing rivers, their water quality, and their “outstandingly remarkable values.” We make a number of suggestions to the managing agencies and to Congress if the WSRA’s achievements over the next half-century are to match the last fifty years, including reviving congressional interest in study rivers, updating managing agencies’ river plans to focus on non-federal lands within river corridors, and ensuring that those river plans provide the watershed protection Congress envisioned when it included a significant amount of riparian land within WSRA river corridors. We also call for a new emphasis on rivers that should be studied for their restoration potential and for more states to take advantage of the statute’s unusual pathway for state-designated rivers to gain WSRA protections. A postscript briefly explains a recent congressional proposal to expand the WSRA system, and an appendix catalogues all 226 WSRA river segments designated during the statute’s first fifty years.

Green Areas and Outdoor Recreational Centres in Ibadan, Nigeria: An Appraisal

Aim: To investigate outdoor recreational potentials and constraints in relation to forestry in five recreational sites within Ibadan metropolis, Nigeria. Study design: The survey was purposively conducted in five (5) locations based on recreational potentials associated with forests and other green environments. Place and Duration of Study: Bower’s Tower; UI Zoological Gardens; Polo Club; Trans Amusement Park and Agodi Gardens between January and February, 2019. Methodology: Total enumeration of visitors who patronized the recreation sites during the course of the study was carried out. Structured questionnaires focused on demographic and perception of visitors on benefits and problems of the green recreational centres were sought. In all, 160 respondents were interviewed. The data collected were analyzed using descriptive statistics and chi-square to test for association between the demographic factors of respondents and their perceptions towards the benefits of green areas. Results: Most of the visitors were within 21- 40 years (57.5%) old; males (61.2%), unmarried/singles (48.8%) while 89.7% had a tertiary education. Recreational visitors spend between N500:00 and N2000:00 averagely per visit and were acquainted with environmental amelioration benefits such as shade, air purification and watershed protection. Visitors identified poor awareness as a major hindrance towards proper management of the centres. Age, marital status and academic qualifications had significant influence on how respondents spend their leisure using chi-square test at p = 0.01. Age (21–40years) is positively associated with outdoor recreation activities. Conclusion: Tourists in Ibadan are aware of multiple benefits associated with green space recreation. Also visitors of all ages and marital status visit green spaces for recreational activities. It is recommended that efforts should be made by owner agencies to improve recreational facilities in the existing urban green areas such as tree planting for improved landscape and engage trained professionals for improved management.