近几十年来,松嫩平原的生态环境严重恶化,荒漠化迅速发展,这与区域水土保持功能持续下降有关。本文应用生态学、经济学和生态环境科学等学科的有关理论,以TM/M OD IS/DEM数据为基础,应用3S技术建立了松嫩平原水土保持价值的复合计算模...近几十年来,松嫩平原的生态环境严重恶化,荒漠化迅速发展,这与区域水土保持功能持续下降有关。本文应用生态学、经济学和生态环境科学等学科的有关理论,以TM/M OD IS/DEM数据为基础,应用3S技术建立了松嫩平原水土保持价值的复合计算模型。计算表明,全区2001年水土保持总价值为662.63亿元,就单位面积的水土保持价值而言,林地最高,为173.59万元/km2,草地次之,为70.42万元/km2,耕地很低,为24.53万元/km2,难利用地仅为2.89万元/km2。水土保持价值分布的总趋势从东北向西南递减,从193.86万元/km2降至18.87万元/km2。研究指出,进行林地、草地建设是提高区域水土保持功能的关键,中、西部尤应加强水土保持工作。本文不仅解决了水土保持价值的量化问题,而且为绿色GDP的核算提供了基础数据。展开更多
A simulation calculation model for the solubility of insoluble compound MmAa in complex system was established.According to coordination equilibrium principle,relevant dissociation reaction,complexation reaction,self-...A simulation calculation model for the solubility of insoluble compound MmAa in complex system was established.According to coordination equilibrium principle,relevant dissociation reaction,complexation reaction,self-complexation reaction and protonation reaction during insoluble compound dissolving were considered and then the mass balance equations about solubility calculation were obtained.In the case analysis,the solubility of silver chloride in ammonia system was obtained by simulation calculation,and curved surface charts of thermodynamic equilibrium about the total concentration of silver ions,pH and concentration of ammonia ions were drawn correspondingly.The results show that under the conditions of room temperature and 6 mol/L ammonia concentration,the calculated solubility value of silver chloride(34 g/L) is close to the actual value(31 g/L),demonstrating that this model is suitable for solubility calculation of insoluble compound MmAa in the complex system.展开更多
文摘近几十年来,松嫩平原的生态环境严重恶化,荒漠化迅速发展,这与区域水土保持功能持续下降有关。本文应用生态学、经济学和生态环境科学等学科的有关理论,以TM/M OD IS/DEM数据为基础,应用3S技术建立了松嫩平原水土保持价值的复合计算模型。计算表明,全区2001年水土保持总价值为662.63亿元,就单位面积的水土保持价值而言,林地最高,为173.59万元/km2,草地次之,为70.42万元/km2,耕地很低,为24.53万元/km2,难利用地仅为2.89万元/km2。水土保持价值分布的总趋势从东北向西南递减,从193.86万元/km2降至18.87万元/km2。研究指出,进行林地、草地建设是提高区域水土保持功能的关键,中、西部尤应加强水土保持工作。本文不仅解决了水土保持价值的量化问题,而且为绿色GDP的核算提供了基础数据。
基金Project(2007CB613604) supported by the National Basic Research Program of China
文摘A simulation calculation model for the solubility of insoluble compound MmAa in complex system was established.According to coordination equilibrium principle,relevant dissociation reaction,complexation reaction,self-complexation reaction and protonation reaction during insoluble compound dissolving were considered and then the mass balance equations about solubility calculation were obtained.In the case analysis,the solubility of silver chloride in ammonia system was obtained by simulation calculation,and curved surface charts of thermodynamic equilibrium about the total concentration of silver ions,pH and concentration of ammonia ions were drawn correspondingly.The results show that under the conditions of room temperature and 6 mol/L ammonia concentration,the calculated solubility value of silver chloride(34 g/L) is close to the actual value(31 g/L),demonstrating that this model is suitable for solubility calculation of insoluble compound MmAa in the complex system.
