Value transfer method

  • 文章类型: Journal Article
    人为活动极大地改变了自然景观,深刻影响土地利用和土地覆盖(LULC),因此,生态系统服务价值(ESV)的提供和功能。评估LULC的变化及其对ESV的影响对于保护生态脆弱的生态系统免受退化至关重要。这项研究的重点是印度高度敏感的上恒河湿地,覆盖Hapur,Amroha,Bulandshahr,和Sambhal区,以其重要的特有动植物而闻名。该研究分析了各种LULC生物群落提供的生态系统服务的微妙变化,包括河流湿地,建立,农田,森林,沙巴,未使用的土地。LULC分类是使用2000年,2010年和2020年的Landsat卫星图像5和8,使用随机森林方法进行的。利用具有两个不同价值系数的价值转移方法评估ESV的时空变化模式:用于全球视角的全局价值系数(C14)和用于更具体的局部上下文的修改的局部价值系数X08。结果表明,建成用地和闲置用地明显增加,从2000年到2020年,湿地和森林相应减少。所有地区的ESV在2000年的总价值分别为5.072亿美元(C14)和2.139亿美元(X08),在2020年下降至4.510亿美元(C14)和1.77亿美元(X08)。敏感性分析表明,所有生物群落的敏感性系数(CS)均低于1,表明采用的价值系数在估计ESV时的稳健性。此外,分析确定了农田,其次是森林和湿地,作为LULC生物群落对变化最敏感。这项研究为利益相关者和政策制定者提供了重要的见解,以制定旨在提高上恒河湿地生态价值的可持续土地管理实践。
    Anthropogenic activities have drastically transformed natural landscapes, profoundly impacting land use and land cover (LULC) and, consequently, the provision and functionality of ecosystem service values (ESVs). Evaluating the changes in LULC and their influence on ESVs is imperative to protect ecologically fragile ecosystems from degradation. This study focuses on a highly sensitive Upper Ganga riverine wetland in India, covering Hapur, Amroha, Bulandshahr, and Sambhal districts, which is well-known for its significant endemic flora and fauna. The study analyzes the subtle variability in ecosystem services offered by the various LULC biomes, including riverine wetland, built-up, cropland, forest, sandbar, and unused land. LULC classification is carried out using Landsat satellite imagery 5 and 8 for the years 2000, 2010, and 2020, using the random forest method. The spatiotemporal changing pattern of ESVs is assessed utilizing the value transfer method with two distinct value coefficients: global value coefficients (C14) for a worldwide perspective and modified local value coefficients X08 for a more specific local context. The results show a significant increase in built-up and unused land, with a corresponding decrease in wetlands and forests from 2000 to 2020. The combined ESVs for all the districts are worth US $5072 million (C14) and US $2139 million (X08) in the year 2000, which declined to US $4510 million (C14) and US $1770 million (X08) in the year 2020. The sensitivity analysis reveals that the coefficient of sensitivity (CS) is below one for all biomes, suggesting the robustness of the employed value coefficients in estimating ESVs. Moreover, the analysis identifies cropland, followed by forests and wetlands, as the LULC biomes most responsive to changes. This research provides crucial insights to stakeholders and policymakers for developing sustainable land management practices aimed at enhancing the ecological worth of the Upper Ganga Riverine Wetland.
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  • 文章类型: Journal Article
    这项研究的目的是评估0-14岁人群减少世纪毒物二恶英类化合物后健康益处的货币价值,15-64岁,和65岁或以上的人在台湾。每吨收益(BPT)方法用于估算2021年至2070年不同地区不同年龄段的收益减少的货币价值。结果表明,每年每克二恶英的BPT为837,915美元。结果进一步表明,对整个台湾来说,从2021年到2025年,儿童每克二恶英减少的净BPT为704美元,42,761美元,用于工作年龄的成年人,老年人34,817美元,和78,282美元。从2051-2070年减少二恶英类化合物将产生整个国家净BPT的83.93%。这大约是2021年至2025年减排净BPT的五倍。这项研究评估的货币利益表明,预防二恶英类化合物的传播和扩散引起的健康损失已大大增加。这意味着现在必须采取行动,伴随着持续的警惕,解决减排问题。
    The objective of this study is to evaluate the monetary value of health benefits following reductions in century poison dioxin-like compounds for people aged 0-14 years old, 15-64 years old, and persons 65 years or over in Taiwan. The benefit per ton (BPT) method is employed to estimate the monetary value of the benefits of such a reduction from 2021 to 2070 for different age groups in different regions. The results indicate a BPT of US$837,915 per gram of dioxin each year. The results further show that for Taiwan as a whole, the net BPT per gram of dioxin reduction from 2021 to 2025 is US$704 for children, US$42,761 for working-age adults, US$34,817 for older adults, and US$78,282 overall. Reductions in dioxin-like compounds from 2051-2070 will generate 83.93% of the net BPT for the entire country. This is approximately five times the net BPT of emissions reduction from 2021 to 2025. The monetary benefits evaluated in this study indicate that the prevention of health losses caused by the spread and diffusion of dioxin-like compounds have increased significantly. This implies that action must be taken now, along with continued vigilance, to address emission reductions.
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  • 文章类型: Journal Article
    The development of the Water Framework Directive aimed to establish an integrated framework of water management at European level. This framework revolves around inland surface waters, transitional waters, coastal waters and ground waters. In the process of achieving the environment and ecological objectives set from the Directive, the role of economics is put in the core of the water management. An important feature of the Directive is the recovery of total economic cost of water services by all users. The total cost of water services can be disaggregated into environmental, financial and resource costs. Another important aspect of the directive is the identification of major drivers and pressures in each River Basin District. We describe a methodology that is aiming to achieve sustainable and environmental and socioeconomic management of freshwater ecosystem services. The Ecosystem Services Approach is in the core of the suggested methodology for the implementation of a more sustainable and efficient water management. This approach consists of the following three steps: (i) socio-economic characterization of the River Basin area, (ii) assessment of the current recovery of water use cost, and (iii) identification and suggestion of appropriate programs of measures for sustainable water management over space and time. This methodology is consistent with a) the economic principles adopted explicitly by the Water Framework Directive (WFD), b) the three-step WFD implementation approach adopted in the WATECO document, c) the Ecosystem Services Approach to valuing freshwater goods and services to humans. Furthermore, we analyze how the effects of multiple stressors and socio-economic development can be quantified in the context of freshwater resources management. We also attempt to estimate the value of four ecosystem services using the benefit transfer approach for the Anglian River Basin, which showed the significance of such services.
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