By means of combining auto-extraction with manual interpretation, the current distribution information about cultivated land is obtained. The distribution information of 1992 is extracted from the dynamic polygons of ...By means of combining auto-extraction with manual interpretation, the current distribution information about cultivated land is obtained. The distribution information of 1992 is extracted from the dynamic polygons of 2002. The monitoring mini-system of the cultivated slope land is established. In the system, detailed surveys, focused on the resources of cultivated slope land, are carried out. The results indicate that the area of the cultivated slope land is very large. Meanwhile, there are lots of cultivated steep slopes with gradient above 35°. The areas of steep land cultivated had been slowly reduced from 1992 to 2002. At the same time, the pressures of returning farm land to forestry are great in all counties. The conflicts between population growth, insufficient grain supply and stagnant economic development sharpen increasingly. It is inevitable to improve the agricultural structure.展开更多
Understanding Pakistan's greenhouse gas(GHG)emission status is critical for identifying the national targets for GHG mitigation with respect to the nationally determined contributions(NDCs).This study focuses on t...Understanding Pakistan's greenhouse gas(GHG)emission status is critical for identifying the national targets for GHG mitigation with respect to the nationally determined contributions(NDCs).This study focuses on the development of Pakistan's GHG(C0_(2),CH_(4),and N20)inventories for agriculture,forestry and other land use(AFOLU)and waste sectors using 2006 IPCC Guidelines.This study should be seen as a direct continuation of the preceding one(Part I[Available online at:https://doi.Org/10.1016/j.accre.2020.05.002])which discusses energy and industrial processes and product use in compliance with the 2006 and 1996 IPCC Guidelines.It also provides sector-specific comparative time series(1994-2017)analysis of GHG inventories,identification of key categories,and national GHG emissions trend for Pakistan.The results indicate an average relative difference(on average for time series 1994-2017)of 19%and 6%in total GHG emissions(C0_(2)-eq)from AFOLU and waste sector respectively between 2006 and 1996 IPCC Guidelines.The absolute difference over the entire time series for AFOLU and waste sector was in the range of 3-67 Mt C0_(2)-eq and 1-7 Mt CQ2-eq respectively.Findings further reveal that the quantity of national GHG emissions by 2006 IPCC Guidelines is 10%lower on average for complete time series compared to 1996 IPCC Guidelines.The average relative difference for total national emissions of C0_(2),CH_(4) and N20 is-1%,9%,and 48%respectively.Key category analysis based on 2006 IPCC Guidelines estimates identified three categories,each contributing>10%to the level assessment in the latest year 2017 and accounting for approximately half of the national GHG emissions.In order to further improve the reliability of GHG inventories,Pakistan needs to move from 1996 to 2006 IPCC Guidelines under a higher Tier approach particularly for identified key categories.展开更多
文摘By means of combining auto-extraction with manual interpretation, the current distribution information about cultivated land is obtained. The distribution information of 1992 is extracted from the dynamic polygons of 2002. The monitoring mini-system of the cultivated slope land is established. In the system, detailed surveys, focused on the resources of cultivated slope land, are carried out. The results indicate that the area of the cultivated slope land is very large. Meanwhile, there are lots of cultivated steep slopes with gradient above 35°. The areas of steep land cultivated had been slowly reduced from 1992 to 2002. At the same time, the pressures of returning farm land to forestry are great in all counties. The conflicts between population growth, insufficient grain supply and stagnant economic development sharpen increasingly. It is inevitable to improve the agricultural structure.
文摘Understanding Pakistan's greenhouse gas(GHG)emission status is critical for identifying the national targets for GHG mitigation with respect to the nationally determined contributions(NDCs).This study focuses on the development of Pakistan's GHG(C0_(2),CH_(4),and N20)inventories for agriculture,forestry and other land use(AFOLU)and waste sectors using 2006 IPCC Guidelines.This study should be seen as a direct continuation of the preceding one(Part I[Available online at:https://doi.Org/10.1016/j.accre.2020.05.002])which discusses energy and industrial processes and product use in compliance with the 2006 and 1996 IPCC Guidelines.It also provides sector-specific comparative time series(1994-2017)analysis of GHG inventories,identification of key categories,and national GHG emissions trend for Pakistan.The results indicate an average relative difference(on average for time series 1994-2017)of 19%and 6%in total GHG emissions(C0_(2)-eq)from AFOLU and waste sector respectively between 2006 and 1996 IPCC Guidelines.The absolute difference over the entire time series for AFOLU and waste sector was in the range of 3-67 Mt C0_(2)-eq and 1-7 Mt CQ2-eq respectively.Findings further reveal that the quantity of national GHG emissions by 2006 IPCC Guidelines is 10%lower on average for complete time series compared to 1996 IPCC Guidelines.The average relative difference for total national emissions of C0_(2),CH_(4) and N20 is-1%,9%,and 48%respectively.Key category analysis based on 2006 IPCC Guidelines estimates identified three categories,each contributing>10%to the level assessment in the latest year 2017 and accounting for approximately half of the national GHG emissions.In order to further improve the reliability of GHG inventories,Pakistan needs to move from 1996 to 2006 IPCC Guidelines under a higher Tier approach particularly for identified key categories.
