Optimization of local seismic network layout based on seismic monitoring capability
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摘要: 为解决带约束条件的台站选址问题，本文借鉴公共服务设施选址最优化理论，深入分析测震台网监测能力的构成要素，并考虑地形坡度、环境噪声水平、台站布局等约束条件，建立了基于地震检测能力、记录能力和定位精度的台网布局最优化模型。之后以成都市测震台网为例，经模拟退火算法求解，获得了分别满足重点监测区和非重点监测区地震监测能力需求的台网布局优化方案，明确给出了新增或新建监测台站的地理位置。Abstract: In order to solve the problem of station location with constraints, the optimization theory of public service facility location is used for reference, and the constituent elements of seismic network monitoring capacity are deeply analyzed, the constraints such as terrain slope, environmental noise level and station layout are also added. Finally, the optimization model of station network layout based on the seismic detection capacity, the recording capacity and the positioning accuracy is established in this paper. Taking the seismic network in Chengdu as an example, the network layout optimization scheme that meets the seismic monitoring capacity requirements of focus and non-focus monitoring areas respectively are obtained by the use of simulated annealing algorithm. And the geographical location of new or newly-built monitoring stations is clearly given.
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Keywords:
- seismic network /
- station layout /
- optimization model /
- monitoring capability
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图 9 成都市测震台网地震定位精度优化
（a） 当前台网ML1.0地震定位精度；（b） 优化后台网地震检测能力；（c） 优化后台网ML0.5地震定位精度
Figure 9. Optimization of seismic positioning accuracy of Chengdu seismic network
（a） The positioning accuracy of the current network for ML1.0 earthquake；（b） Seismic detection capability of optimized network；（c） The positioning accuracy of optimized network for ML0.5 earthquake
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图 1 需求点（a）与台站点（b）集合示意图
Figure 1. Schematic diagram of demand point collection （a） and station collection （b）
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图 2 成都市活动断裂、地震震中及测震台站分布
Figure 2. Distribution of active faults， epicenters and seismic stations in Chengdu
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图 4 成都市地形坡度（a）和环境噪声水平（b）
Figure 4. Terrain slope （a） and ambient noise level （b） in Chengdu
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图 5 成都市区台站建设环境条件分布
Figure 5. Distribution of station built environmental condition in Chengdu
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图 6 成都市当前（a）和优化后（b）的测震台网地震检测能力
Figure 6. Current （a） and optimized （b） seismic detection capability of the seismic network in Chengdu
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图 7 成都市当前（a）和优化后（b）的测震台网地震记录能力
Figure 7. Current （a） and optimized （b） seismic recording capacity of seismic network in Chengdu
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