为了解裂隙岩体内部水汽内循环(ICWV)特征规律,选择凤山采石场进行裂隙岩体温湿度监测,得到4个季节裂隙岩体非饱和带温湿度监测数据.对湿度数据进行横向及空间比对分析,结果表明,不同位置处的裂隙岩体非饱和带ICWV特征存在差异性,春季I...为了解裂隙岩体内部水汽内循环(ICWV)特征规律,选择凤山采石场进行裂隙岩体温湿度监测,得到4个季节裂隙岩体非饱和带温湿度监测数据.对湿度数据进行横向及空间比对分析,结果表明,不同位置处的裂隙岩体非饱和带ICWV特征存在差异性,春季ICWV较为频繁,在孔深20~440cm均存在ICWV;夏季在岩体低处形成短时间的ICWV;秋季ICWV出现在岩体高处浅部;夏季和冬季在较高处,孔深20~100 cm ICWV频繁出现,并形成水汽的源汇项.春季在裂隙岩体内部形成湿度“异常分布区”,影响春季岩体ICWV规律.展开更多
Over-exploitation of groundwater in North China Plain(NCP) has resulted in a series of eco-environment problems. Sustainable use of groundwater resources in NCP, in particular management of groundwater resource carryi...Over-exploitation of groundwater in North China Plain(NCP) has resulted in a series of eco-environment problems. Sustainable use of groundwater resources in NCP, in particular management of groundwater resource carrying capacity(GRCC), faces an unprecedented challenge. Here we define GRCC, and a new assessment method is tentatively proposed and applied to evaluate GRCC based on the whole NCP, city administrative units and county administrative units. Our study divided the NCP into three zones, i.e. non-overexploited non-overloaded zone(NNZ), overexploited but non-overloaded zone(ONZ), and overexploited overloaded zone(OOZ). Results confirmed 27.6% of counties belonged to NNZ. However, 58.9% of counties and NCP as a whole belonged to ONZ, and 13.5% of counties belonged to OOZ. Spatially, NNZs were mainly distributed in Beijing, parts of eastern coastal cities and Henan Province. OOZs were mostly distributed in middle-eastern part of Cangzhou, parts of Dezhou, Tianjin and Binzhou, and the remaining areas belonged to ONZs. We suggest two approaches for enhancing GRCC, i) increasing the amount of available groundwater and ii) improving the water use efficiency. An increase of 11.0 billion cubic meters to the available groundwater levels combined with water use efficiency improvements up to 479 CNY per cubic meter of the world mean, the gross domestic product(GDP) sustained by groundwater in the NCP could reach 11.1 trillion CNY and maintain a 20 years of GDP development assuming the current rate of growth.展开更多
文摘为了解裂隙岩体内部水汽内循环(ICWV)特征规律,选择凤山采石场进行裂隙岩体温湿度监测,得到4个季节裂隙岩体非饱和带温湿度监测数据.对湿度数据进行横向及空间比对分析,结果表明,不同位置处的裂隙岩体非饱和带ICWV特征存在差异性,春季ICWV较为频繁,在孔深20~440cm均存在ICWV;夏季在岩体低处形成短时间的ICWV;秋季ICWV出现在岩体高处浅部;夏季和冬季在较高处,孔深20~100 cm ICWV频繁出现,并形成水汽的源汇项.春季在裂隙岩体内部形成湿度“异常分布区”,影响春季岩体ICWV规律.
基金support of the National Basic Research Program of China (973 Program (2010CB428805))the Fundamental Research Fund (SK201306) of the Central Scientific & Research Institutes, Chinese Academy of Geological Sciences, the Institute of Hydrogeology and Environmental Geology, and the National Natural Science Foundation of China (41502253)
文摘Over-exploitation of groundwater in North China Plain(NCP) has resulted in a series of eco-environment problems. Sustainable use of groundwater resources in NCP, in particular management of groundwater resource carrying capacity(GRCC), faces an unprecedented challenge. Here we define GRCC, and a new assessment method is tentatively proposed and applied to evaluate GRCC based on the whole NCP, city administrative units and county administrative units. Our study divided the NCP into three zones, i.e. non-overexploited non-overloaded zone(NNZ), overexploited but non-overloaded zone(ONZ), and overexploited overloaded zone(OOZ). Results confirmed 27.6% of counties belonged to NNZ. However, 58.9% of counties and NCP as a whole belonged to ONZ, and 13.5% of counties belonged to OOZ. Spatially, NNZs were mainly distributed in Beijing, parts of eastern coastal cities and Henan Province. OOZs were mostly distributed in middle-eastern part of Cangzhou, parts of Dezhou, Tianjin and Binzhou, and the remaining areas belonged to ONZs. We suggest two approaches for enhancing GRCC, i) increasing the amount of available groundwater and ii) improving the water use efficiency. An increase of 11.0 billion cubic meters to the available groundwater levels combined with water use efficiency improvements up to 479 CNY per cubic meter of the world mean, the gross domestic product(GDP) sustained by groundwater in the NCP could reach 11.1 trillion CNY and maintain a 20 years of GDP development assuming the current rate of growth.
