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Understanding land-use/cover change process for land and environmental resources use management policy in Ghana 总被引：2，自引：0，他引：2
Opoku Pabi 《GeoJournal》2007,68(4):369-383
Accurate information on land-use/cover change is a critical input for natural resource use management policy decisions. In
Ghana, however, land-use/cover change is premised on the assumption that there has been a historically simple, linear, and
uniform degradation of vegetation across all landscapes. The Kintampo and neighboring districts have become a subject of intense
debate as to the real nature of prevailing land cover changes .It is commonly assumed that there is ubiquitously progressive
irreversible woody vegetation loss across the area. The paper reports on the process and amount of land-use/cover changes
that have prevailed in specific localities across the area within a 10-year period. It is hoped this will improve understanding
and management of land-use/cover change in Ghana. Remote sensing and Geographic information systems technologies were used
for the investigation. A multi-site satellite imagery approach was adopted to ensure that inductive inferences could be made.
The outcome of the study indicated that, in space and time, there have been significant land-use/cover changes. Variability
in change was a constant, rather than occasional feature across these human dominated landscapes. The conversion and transformation
processes indicated that the traditional land-use strategies are self-sustaining. Any effective land-use/cover management
strategy should be built upon the existing traditional farming system knowledge and practices. 相似文献
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Negasi Solomon Opoku Pabi Ted Annang Isaac K. Asante Emiru Birhane 《Carbon balance and management》2018,13(1):14
Background
Forests play an important role in mitigating global climate change by capturing and sequestering atmospheric carbon. Quantitative estimation of the temporal and spatial pattern of carbon storage in forest ecosystems is critical for formulating forest management policies to combat climate change. This study explored the effects of land cover change on carbon stock dynamics in the Wujig Mahgo Waren forest, a dry Afromontane forest that covers an area of 17,000 ha in northern Ethiopia.Results
The total carbon stocks of the Wujig Mahgo Waren forest ecosystems estimated using a multi-disciplinary approach that combined remote sensing with a ground survey were 1951, 1999, and 1955 GgC in 1985, 2000 and 2016 years respectively. The mean carbon stocks in the dense forests, open forests, grasslands, cultivated lands and bare lands were estimated at 181.78?±?27.06, 104.83?±?12.35, 108.77?±?6.77, 76.54?±?7.84 and 83.11?±?8.53 MgC ha?1 respectively. The aboveground vegetation parameters (tree density, DBH and height) explain 59% of the variance in soil organic carbon.Conclusions
The obtained estimates of mean carbon stocks in ecosystems representing the major land cover types are of importance in the development of forest management plan aimed at enhancing mitigation potential of dry Afromontane forests in northern Ethiopia.5.
Water forms an essential resource for life on earth because all living things on earth depend on water for life activities. However, with the increase in the human population, which is coupled with intense urbanization and agricultural activities, global water pollution has increased over the past decades. In China, agricultural activities that occure mainly in the planting fields have been listed as the main source of surface water and groundwater pollution. This review focuses on the major factors that influence pollution from planting fields in China mainly as a result of farming activities such as flood irrigation, excessive application of fertilizers and pesticides, and poor management practices. At present, good results are achieved by adopting soil fertilization test formula, biodegradable pesticides, proper irrigation, and agroforestry interventions. In the future, pollution from planting fields as a non‐point source of water pollution can be improved and resolved by perfect nutrient management, best management practices, organic amendments, restoring water environment, and intelligent assessment management. 相似文献
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