基于2003—2007年CERES SSF Aqua MODIS Edition 2B/2C数据集,利用Surfur、IDL等软件对低层云量、水云云水柱含量、水云粒子半径、冰云云水柱含量和冰云粒子等效直径等低层云参量多年高值的空间分布、季节变化进行了综合分析,重点探讨...基于2003—2007年CERES SSF Aqua MODIS Edition 2B/2C数据集,利用Surfur、IDL等软件对低层云量、水云云水柱含量、水云粒子半径、冰云云水柱含量和冰云粒子等效直径等低层云参量多年高值的空间分布、季节变化进行了综合分析,重点探讨了新疆城市地区云水资源潜力。结果发现:研究区域的低层云参量多年平均值的高值分布在三大山区,低值分布在塔克拉玛干沙漠;部分典型的干旱城市也出现了低云参量的高值区,例如和田、克拉玛依、哈密;在吐鲁番地区春夏季冰云云水柱含量和冰云粒子等效直径多年均值高于秋冬季,有利于春夏季进行人工增水。展开更多
Michoacán has a deforested area of 525,260 ha, representing 52,526 ha per year, mainly caused by anthropogenic disturbances such as agricultural burning and forest fires (50%), change of use of land for extensive...Michoacán has a deforested area of 525,260 ha, representing 52,526 ha per year, mainly caused by anthropogenic disturbances such as agricultural burning and forest fires (50%), change of use of land for extensive livestock farming (28%), agriculture (17%) and illegal logging (5%). The establishment of forest plantations is an alternative for reducing the pressure on natural forests and creating options for sustainable development and diversification of production and conversion of land for agricultural and livestock fragmented for forestry purposes. The aim of this study was to determine the potential areas for commercial forest plantations of Enterolobium cyclocarpum (Jacq.) Griseb. in the State of Michoacán, México, through the use of Geographic information systems (GIS). Areas were identified using IDRISI 32, and ArcView software. Screening variables include annual temperature, annual precipitation, land use, soil type, elevation and slope. Products obtained were field verified. Two maps where potential areas for the establishment of commercial forest plantations of E. cyclocarpum shown were obtained. Potential areas for commercial forest plantation establishment are (0% - 15% slope) for commercial forest plantations mechanized was 57,227 ha and (15% - 30% slope) for manual plantations was 6273 ha. The total area in the state with potential for the establishment of the species in the study was 63,500 ha.展开更多
国内大多数煤层气田储层物性较差,渗透率一般小于1.0 m D,井网井距偏大,导致区域协同降压困难,气井产量较低,水平井加密调整是解决煤层气井增产的有效关键技术之一。以柿庄南区块为研究对象,通过试井干扰、数值模拟等手段,评价了该区井...国内大多数煤层气田储层物性较差,渗透率一般小于1.0 m D,井网井距偏大,导致区域协同降压困难,气井产量较低,水平井加密调整是解决煤层气井增产的有效关键技术之一。以柿庄南区块为研究对象,通过试井干扰、数值模拟等手段,评价了该区井网井距的合理性,根据储层地质参数优选了水平井加密潜力区,设计了水平井加密调整方案,并应用实施。结果表明:水平井加密调整后,缩短了煤层气井间距离,区域气井间形成有效沟通,形成了区域降压,水平井稳定日产气量3 600 m3,为周边气井的2.5倍,周边气井单井平均日增产300 m3,取得明显效果。展开更多
文摘基于2003—2007年CERES SSF Aqua MODIS Edition 2B/2C数据集,利用Surfur、IDL等软件对低层云量、水云云水柱含量、水云粒子半径、冰云云水柱含量和冰云粒子等效直径等低层云参量多年高值的空间分布、季节变化进行了综合分析,重点探讨了新疆城市地区云水资源潜力。结果发现:研究区域的低层云参量多年平均值的高值分布在三大山区,低值分布在塔克拉玛干沙漠;部分典型的干旱城市也出现了低云参量的高值区,例如和田、克拉玛依、哈密;在吐鲁番地区春夏季冰云云水柱含量和冰云粒子等效直径多年均值高于秋冬季,有利于春夏季进行人工增水。
文摘Michoacán has a deforested area of 525,260 ha, representing 52,526 ha per year, mainly caused by anthropogenic disturbances such as agricultural burning and forest fires (50%), change of use of land for extensive livestock farming (28%), agriculture (17%) and illegal logging (5%). The establishment of forest plantations is an alternative for reducing the pressure on natural forests and creating options for sustainable development and diversification of production and conversion of land for agricultural and livestock fragmented for forestry purposes. The aim of this study was to determine the potential areas for commercial forest plantations of Enterolobium cyclocarpum (Jacq.) Griseb. in the State of Michoacán, México, through the use of Geographic information systems (GIS). Areas were identified using IDRISI 32, and ArcView software. Screening variables include annual temperature, annual precipitation, land use, soil type, elevation and slope. Products obtained were field verified. Two maps where potential areas for the establishment of commercial forest plantations of E. cyclocarpum shown were obtained. Potential areas for commercial forest plantation establishment are (0% - 15% slope) for commercial forest plantations mechanized was 57,227 ha and (15% - 30% slope) for manual plantations was 6273 ha. The total area in the state with potential for the establishment of the species in the study was 63,500 ha.
