Assessment of Land Comprehensive Carrying Capacity in Lin'an City

According to regional characteristics and the actual situation in Lin ’an City, an evaluation index system of land comprehensive carrying capacity composed of three support subsystems （eco-environment, social and economic carrying capaci-ties） containing 22 evaluation indexes was established to evaluate the comprehen-sive carrying capacity of land resource in Lin’an City during 2005-2012. Meanwhile, based on the target data of overal land use plan, the level of land comprehensive carrying capacity was predicted at the end of the plan period （2020） .The results showed that land comprehensive carrying capacity had a significant growth in Lin ’an from 2005 to 2012, and the development trend was basical y sustainable. The sub-systems also had been greatly improved, in which the constant improvement of ec-ological environment carrying capacity made the largest contribution to the constant raising of land comprehensive carrying capacity. The degree of coordination between the systems was poor, in which eco-environment carrying capacity had the maxi-mum growth, far more than the social and economic carrying capacities. According to the land comprehensive carrying capacity in 2020, utilization of land resources in Lin＆#39;an city can achieve sustainable development in general. Final y, proposals of im-proving comprehensive carrying capacity were put forward in terms of the enhance-ment of eco-environment protection, accelerating economic development and policy guidance.

浙江临安地区下寒武统荷塘组页岩气地质条件与勘探前景

通过野外实地观察、样品采集及系列实验分析发现，浙江临安地区下寒武统荷塘组页岩在研究区分布广泛，沉积厚度大（约150～300 m ），有机质丰度高（wTOC 为0．22％～13．56％），热演化程度较高（Ro 为3．23％～5．22％），达过成熟阶段，满足页岩气富集条件；储存孔隙以微孔为主，面孔率小于1％，微细孔隙不发育，等温吸附实验测得吸附质量体积为0．88～4．97 m3／t ，平均为3．05 m3／t ，表明研究区页岩具有较强的吸附能力。同时研究认为，后期改造相对较弱的地区应该是该区页岩气勘探开发的有利区。