112 short-period seismographs were set up in the 400 km^2 area of Pingtan Island and its surrounding areas in Fujian.The combined observations of the airgun source and ambient noise source were carried out using a den...112 short-period seismographs were set up in the 400 km^2 area of Pingtan Island and its surrounding areas in Fujian.The combined observations of the airgun source and ambient noise source were carried out using a dense array to receive the 387 airgun signals excited around the island and one month of continuous ambient noise recording.The 1-D P-wave and S-wave shallow velocity model of Pingtan Island is obtained by the inversion of the airgun body wave’s first arrival time data,and the reliability of the velocity model is verified by using the surface wave phase velocity dispersion curve,which can provide initial model for subsequent 3-D imaging.The experimental results show that this experiment is a successful demonstration of local scale green non-destructive detection,which can provide basic data for shallow surface structure research and strong vibration simulation of the Pingtan Island.展开更多
基于2000-2020年土地利用数据分析闽三角城市群土地利用变化情况,结合当量因子表核算生态系统服务价值(Ecosystem Service Value,ESV)变化情况,并以2035年为目标年,利用CA-Markov模型模拟自然发展、经济发展、生态保护、耕地保护4种情...基于2000-2020年土地利用数据分析闽三角城市群土地利用变化情况,结合当量因子表核算生态系统服务价值(Ecosystem Service Value,ESV)变化情况,并以2035年为目标年,利用CA-Markov模型模拟自然发展、经济发展、生态保护、耕地保护4种情景下土地利用和生态系统服务价值变化,据此讨论土地利用变化对ESV的影响,并对不同生态系统服务类型进行协同/权衡关系分析。结果表明:①2000-2020年闽三角城市群耕地面积锐减,建设用地大范围扩张,林地、草地面积少量缩减;2000年、2005年、2010年、2015年、2020年研究区ESV总量分别为2281.34亿元、2258.54亿元、2196.82亿元、2175.81亿元、2200.69亿元,总体呈下降趋势。②2035年闽三角城市群在自然发展、耕地保护、生态保护、经济发展4种情景下,ESV总量分别为2138.42亿元、2133.04亿元、2166.35亿元、2112.63亿元,均呈下降趋势,经济发展情景下ESV总量最低,自然发展与耕地保护情景下ESV总量损失也较大,而生态保护情景有效延缓了ESV的下降趋势,且生态系统服务类型间的协同关系最强,成为未来闽三角城市群土地利用优化的最优情景。展开更多
基金sponsored by the Key Technologies R&D Program of Fujian Earthquake Agency(G201703)the Seismic Science and Technology Spark Program,CEA(XH19023Y)
文摘112 short-period seismographs were set up in the 400 km^2 area of Pingtan Island and its surrounding areas in Fujian.The combined observations of the airgun source and ambient noise source were carried out using a dense array to receive the 387 airgun signals excited around the island and one month of continuous ambient noise recording.The 1-D P-wave and S-wave shallow velocity model of Pingtan Island is obtained by the inversion of the airgun body wave’s first arrival time data,and the reliability of the velocity model is verified by using the surface wave phase velocity dispersion curve,which can provide initial model for subsequent 3-D imaging.The experimental results show that this experiment is a successful demonstration of local scale green non-destructive detection,which can provide basic data for shallow surface structure research and strong vibration simulation of the Pingtan Island.
文摘基于2000-2020年土地利用数据分析闽三角城市群土地利用变化情况,结合当量因子表核算生态系统服务价值(Ecosystem Service Value,ESV)变化情况,并以2035年为目标年,利用CA-Markov模型模拟自然发展、经济发展、生态保护、耕地保护4种情景下土地利用和生态系统服务价值变化,据此讨论土地利用变化对ESV的影响,并对不同生态系统服务类型进行协同/权衡关系分析。结果表明:①2000-2020年闽三角城市群耕地面积锐减,建设用地大范围扩张,林地、草地面积少量缩减;2000年、2005年、2010年、2015年、2020年研究区ESV总量分别为2281.34亿元、2258.54亿元、2196.82亿元、2175.81亿元、2200.69亿元,总体呈下降趋势。②2035年闽三角城市群在自然发展、耕地保护、生态保护、经济发展4种情景下,ESV总量分别为2138.42亿元、2133.04亿元、2166.35亿元、2112.63亿元,均呈下降趋势,经济发展情景下ESV总量最低,自然发展与耕地保护情景下ESV总量损失也较大,而生态保护情景有效延缓了ESV的下降趋势,且生态系统服务类型间的协同关系最强,成为未来闽三角城市群土地利用优化的最优情景。