This paper addresses the question of whether the Hang Kong government made a rational economic decision when it decided to set aside land to develop a Wetland Park, or whether it should have used the land for alternat...This paper addresses the question of whether the Hang Kong government made a rational economic decision when it decided to set aside land to develop a Wetland Park, or whether it should have used the land for alternative commercial developments. Different analytical methods are used to estimate the economic value of the environmental benefits of the Wetland Park： the Value Transfer Method is used to estimate the economic value oJ the ecological services provided by the Park. the Direct Market Price analysis for the economic value of the goods purchased in the Wetland Park, the Hedonic Housing Price Analysis for the value of the Park to those residing in its proximity, the Travel Cost and Contingent Valuation Method for the value of the Park to the visitors, and the Contingent Valuation for the Passive （Nonuse） Values of the Park. These benefits are compared to the opportunity cost of the land and the cost of running the Wetland Park. The article concludes that if a rate of 5% or less is used to discount fiture costs and benefits, we would find that the government＇s decision to set aside land for a Wetland Park was economically sound while using a discount rate of 6% or more shows that it was not.展开更多
The GEF-WB Nutrient Reduction project aims to reduce the phosphorus inputs of the Black Sea from the Danube by means of different interventions. Hungary takes part of this project by enhancing the nutrient trapping ca...The GEF-WB Nutrient Reduction project aims to reduce the phosphorus inputs of the Black Sea from the Danube by means of different interventions. Hungary takes part of this project by enhancing the nutrient trapping capacity of the Gemenc and Beda-Karapancsa wetlands （GBK） which can be found on the premises of the Danube Drava National Park along the Danube River in Southern Hungary. Due to anthropogenic influences, less of small floods reach the oxbows of the area than some decades before which has a negative effect on the ecosystem. The objective of the study is to predict the nutrient reduction capacity of the Gemenc-B6da-Karapancsa water system and to make a proposal to increase this capacity. Although the floodplain vegetation has a huge nutrient intake capacity, this is limited by the fact that the floodplain is not always covered by the water of the river Danube. For that reason, a combination of hydrodynamic modelling, flood probability calculation and an estimation of suspended solids settling constitute the base of this study. The main course taken into account is the settling of suspended solids and the ratio of total nitrogen and total phosphorus to the mass of sediment is determined by local measurement results.展开更多
Alternatives to the sectoral and public policies and regulations of environmental and water resources＇ protection, and the experiments of integrated management have been rapidly multiplied since the year 1990. Water ...Alternatives to the sectoral and public policies and regulations of environmental and water resources＇ protection, and the experiments of integrated management have been rapidly multiplied since the year 1990. Water constitutes a principal stake of these environmental policies in the majority of the countries and especially in the countries of North Africa as Algeria, where this resource is threatened by repeated dryness and by the impact of the climate change. The integrated water resource management reflects today the world tendency of the governments to exploit and preserve this resource by a way based on a process of governance, which passes by the dialog of diversified actors （various sectors）. According to this policy and to the promulgation of the Algerian National Report on State effective implementation and coordination mechanisms are required. How this principle of integrated water management will be executed with various scenarios in Algeria and what are the main difficulties that can be met？ Or, more exactly, what are the variables that can influence the operation of the local water process governorship？ This analysis will be carried out through the example of the Wadi El K6bir watershed located in the northeast of Algeria, which is real natural area of water supply that feeds the communities, the natural and artificial basins, and preserves the perenniality of the existing natural ecosystems especially the one of the natural park classified by the United Nations Educational Scientific and Cultural Organization （U.N.E.S.C.O） in 1989 as the inheritance of humanity and six other sites classified according to the Ramsar convention as wetlands of international importance to be preserved.展开更多
The ecosystems of Kaohsiung are rich and diverse. Examples of ecosystems include the tropical rainforest ecology, marine ecology of the coastal forests, and the estuary type ecology of mangrove forests. The Jhong-Dou ...The ecosystems of Kaohsiung are rich and diverse. Examples of ecosystems include the tropical rainforest ecology, marine ecology of the coastal forests, and the estuary type ecology of mangrove forests. The Jhong-Dou Wetland Park is situated in the Jhong-Dou Redevelopment Zone, 2.5km from the Lover River Estuary. This area is defined by brackish aquatic environments--a mixture of fresh and salt water, and fulfills the criteria for mangrove restoration. It is expected that the current restoration project will recreate an epitome of the once-diverse, co-existing mangrove species of Kaohsiung＇s past, and improves upon the functions of environmental education. The initial mangrove species planned for restoration are the existing Kandelia obovata, Rhizophora stylosa, Avicennia marina and the Lumnitzera racemosa populations of the Kaohsiung area. These plants will be placed in experimental habitats that correspond to the unique micro-climates required for the growth of each species, and the mangrove-associated plants will also be restored concurrently in the terrestrial environments behind the mangrove forests. The process of restoration will be monitored by academia, as well as providing reference for subsequent mangrove environment restoration efforts. The main purpose of this research in these four mangrove species of this wetland park is to understand their adaptation to the rehabilitating environment, and be able to feedback these information to the design and maintenance team of the park. The research method is to observe and record their growing status, also execute a survey on the nearby mangrove habitation. The observation has started on December 1 st of 2010, and still has been continued carry on since then. From the research result, it shows that the A vicennia marina （Forsk.） Vierh. and Lumnitzera racemosa Willd. are the two species that had been well adapted to this wetland park. It was recommended to the Kaohsiung City Government that the restoration of the extinct Ceriops tagal and Bruguiera gymnorrhiza can be achieved through foreign species exchanges （the species must be identified before introduction）, and that plans for monitoring the flora and fauna in the park should be drafted to record the ecological alterations of the Jhong-Dou Wetlands. This will pronounce the ecological importance of Kaohsiung on a global, geographical scale. Lastly, the Government should draw up plans of mangrove forest maintenance in order to sustain the ecological and landscape recreational functions of the Jhong-Dou Wetland Park.展开更多
In carbon global cycle, the relationship between the terrestrial ecosystem and the atmosphere where there are, among others, gases that contribute to the greenhouse effect, has become object of relevant scientific int...In carbon global cycle, the relationship between the terrestrial ecosystem and the atmosphere where there are, among others, gases that contribute to the greenhouse effect, has become object of relevant scientific interest. The content of organic matter in soil, expressed by its supplies as well as the organic matter degree of stability, are factors that can prevent the soil from acting as a drain and at the same time contribute for it to become a source of those gases. The variations in the way land is used in Brazil are factors responsible for the increase in emission of greenhouse effect gases. Based on these facts, this study was aimed to evaluate the CO2 and CH4 efflux using a gas retention chamber, and to associate these emissions to the organic carbon content in the soil. Two different areas were selected for the study, one in Tijuca Forest National Park, in a forest area, and the other at the Rio de Janeiro Federal Rural University campus. In the latter, the area was stratified in three sub areas according to the vegetation, use and water saturation degree. Samplings were performed during 8 months between 2013 and 2014.展开更多
Four urban greenbelt types including roadside greenbelt, resident-area greenbelt, landscape forest, and forest park, were simultaneously investigated in Shenzhen, China, in such measures as air temperature, air humidi...Four urban greenbelt types including roadside greenbelt, resident-area greenbelt, landscape forest, and forest park, were simultaneously investigated in Shenzhen, China, in such measures as air temperature, air humidity, wind speed, air anion ratio, and inhalabal particle concentration, which were strongly related with pleasing feeling of human body. The results show that the average air temperature in both forest park and landscape forest is much closer to the pleasing feeling of human body temperature than that of the rest two greenbelts, where it is 1.782 ℃ and 0.837℃ in forest park as well as 3.084 ℃ and 2.140 ℃ in landscape forest less than that of roadside and resident-area greenbelts, respectively. In terms of mean air humidity, forest park and landscape forest are 3.034% and 7.563% higher than that of roadside greenbelt, and 1.205% and 5.734% higher than that of resident-area greenbelt, respectively, implying a sound humidity feeling of human comfort in the former two types. The air cleanness holds a descending rank as forest park, landscape forest, resident-area greenbelt, and roadside greenbelt, whereas the rank in inhalable particle concentration is completely reverse. In general, landscape forest and forest park that mainly consist of trees have a comparatively higher feeling of human comfort whereas roadside and resident-area greenbelts fluctuate irregularly to some extent for the measures studied. The four greenbelt types investigated could be summarized in human comfort as the following descending rank, forest park, landscape forest, resident-area greenbelt, and roadside greenbelt.展开更多
文摘This paper addresses the question of whether the Hang Kong government made a rational economic decision when it decided to set aside land to develop a Wetland Park, or whether it should have used the land for alternative commercial developments. Different analytical methods are used to estimate the economic value of the environmental benefits of the Wetland Park： the Value Transfer Method is used to estimate the economic value oJ the ecological services provided by the Park. the Direct Market Price analysis for the economic value of the goods purchased in the Wetland Park, the Hedonic Housing Price Analysis for the value of the Park to those residing in its proximity, the Travel Cost and Contingent Valuation Method for the value of the Park to the visitors, and the Contingent Valuation for the Passive （Nonuse） Values of the Park. These benefits are compared to the opportunity cost of the land and the cost of running the Wetland Park. The article concludes that if a rate of 5% or less is used to discount fiture costs and benefits, we would find that the government＇s decision to set aside land for a Wetland Park was economically sound while using a discount rate of 6% or more shows that it was not.
文摘The GEF-WB Nutrient Reduction project aims to reduce the phosphorus inputs of the Black Sea from the Danube by means of different interventions. Hungary takes part of this project by enhancing the nutrient trapping capacity of the Gemenc and Beda-Karapancsa wetlands （GBK） which can be found on the premises of the Danube Drava National Park along the Danube River in Southern Hungary. Due to anthropogenic influences, less of small floods reach the oxbows of the area than some decades before which has a negative effect on the ecosystem. The objective of the study is to predict the nutrient reduction capacity of the Gemenc-B6da-Karapancsa water system and to make a proposal to increase this capacity. Although the floodplain vegetation has a huge nutrient intake capacity, this is limited by the fact that the floodplain is not always covered by the water of the river Danube. For that reason, a combination of hydrodynamic modelling, flood probability calculation and an estimation of suspended solids settling constitute the base of this study. The main course taken into account is the settling of suspended solids and the ratio of total nitrogen and total phosphorus to the mass of sediment is determined by local measurement results.
文摘Alternatives to the sectoral and public policies and regulations of environmental and water resources＇ protection, and the experiments of integrated management have been rapidly multiplied since the year 1990. Water constitutes a principal stake of these environmental policies in the majority of the countries and especially in the countries of North Africa as Algeria, where this resource is threatened by repeated dryness and by the impact of the climate change. The integrated water resource management reflects today the world tendency of the governments to exploit and preserve this resource by a way based on a process of governance, which passes by the dialog of diversified actors （various sectors）. According to this policy and to the promulgation of the Algerian National Report on State effective implementation and coordination mechanisms are required. How this principle of integrated water management will be executed with various scenarios in Algeria and what are the main difficulties that can be met？ Or, more exactly, what are the variables that can influence the operation of the local water process governorship？ This analysis will be carried out through the example of the Wadi El K6bir watershed located in the northeast of Algeria, which is real natural area of water supply that feeds the communities, the natural and artificial basins, and preserves the perenniality of the existing natural ecosystems especially the one of the natural park classified by the United Nations Educational Scientific and Cultural Organization （U.N.E.S.C.O） in 1989 as the inheritance of humanity and six other sites classified according to the Ramsar convention as wetlands of international importance to be preserved.
文摘The ecosystems of Kaohsiung are rich and diverse. Examples of ecosystems include the tropical rainforest ecology, marine ecology of the coastal forests, and the estuary type ecology of mangrove forests. The Jhong-Dou Wetland Park is situated in the Jhong-Dou Redevelopment Zone, 2.5km from the Lover River Estuary. This area is defined by brackish aquatic environments--a mixture of fresh and salt water, and fulfills the criteria for mangrove restoration. It is expected that the current restoration project will recreate an epitome of the once-diverse, co-existing mangrove species of Kaohsiung＇s past, and improves upon the functions of environmental education. The initial mangrove species planned for restoration are the existing Kandelia obovata, Rhizophora stylosa, Avicennia marina and the Lumnitzera racemosa populations of the Kaohsiung area. These plants will be placed in experimental habitats that correspond to the unique micro-climates required for the growth of each species, and the mangrove-associated plants will also be restored concurrently in the terrestrial environments behind the mangrove forests. The process of restoration will be monitored by academia, as well as providing reference for subsequent mangrove environment restoration efforts. The main purpose of this research in these four mangrove species of this wetland park is to understand their adaptation to the rehabilitating environment, and be able to feedback these information to the design and maintenance team of the park. The research method is to observe and record their growing status, also execute a survey on the nearby mangrove habitation. The observation has started on December 1 st of 2010, and still has been continued carry on since then. From the research result, it shows that the A vicennia marina （Forsk.） Vierh. and Lumnitzera racemosa Willd. are the two species that had been well adapted to this wetland park. It was recommended to the Kaohsiung City Government that the restoration of the extinct Ceriops tagal and Bruguiera gymnorrhiza can be achieved through foreign species exchanges （the species must be identified before introduction）, and that plans for monitoring the flora and fauna in the park should be drafted to record the ecological alterations of the Jhong-Dou Wetlands. This will pronounce the ecological importance of Kaohsiung on a global, geographical scale. Lastly, the Government should draw up plans of mangrove forest maintenance in order to sustain the ecological and landscape recreational functions of the Jhong-Dou Wetland Park.
文摘In carbon global cycle, the relationship between the terrestrial ecosystem and the atmosphere where there are, among others, gases that contribute to the greenhouse effect, has become object of relevant scientific interest. The content of organic matter in soil, expressed by its supplies as well as the organic matter degree of stability, are factors that can prevent the soil from acting as a drain and at the same time contribute for it to become a source of those gases. The variations in the way land is used in Brazil are factors responsible for the increase in emission of greenhouse effect gases. Based on these facts, this study was aimed to evaluate the CO2 and CH4 efflux using a gas retention chamber, and to associate these emissions to the organic carbon content in the soil. Two different areas were selected for the study, one in Tijuca Forest National Park, in a forest area, and the other at the Rio de Janeiro Federal Rural University campus. In the latter, the area was stratified in three sub areas according to the vegetation, use and water saturation degree. Samplings were performed during 8 months between 2013 and 2014.
文摘Four urban greenbelt types including roadside greenbelt, resident-area greenbelt, landscape forest, and forest park, were simultaneously investigated in Shenzhen, China, in such measures as air temperature, air humidity, wind speed, air anion ratio, and inhalabal particle concentration, which were strongly related with pleasing feeling of human body. The results show that the average air temperature in both forest park and landscape forest is much closer to the pleasing feeling of human body temperature than that of the rest two greenbelts, where it is 1.782 ℃ and 0.837℃ in forest park as well as 3.084 ℃ and 2.140 ℃ in landscape forest less than that of roadside and resident-area greenbelts, respectively. In terms of mean air humidity, forest park and landscape forest are 3.034% and 7.563% higher than that of roadside greenbelt, and 1.205% and 5.734% higher than that of resident-area greenbelt, respectively, implying a sound humidity feeling of human comfort in the former two types. The air cleanness holds a descending rank as forest park, landscape forest, resident-area greenbelt, and roadside greenbelt, whereas the rank in inhalable particle concentration is completely reverse. In general, landscape forest and forest park that mainly consist of trees have a comparatively higher feeling of human comfort whereas roadside and resident-area greenbelts fluctuate irregularly to some extent for the measures studied. The four greenbelt types investigated could be summarized in human comfort as the following descending rank, forest park, landscape forest, resident-area greenbelt, and roadside greenbelt.
