不同滤波方法对GRACE反演西南岩溶区陆地水储量变化的影响

张青全; 潘云; 宫辉力; 郑龙群; 诸云强

doi:10.3799/dqkx.2019.153

不同滤波方法对GRACE反演西南岩溶区陆地水储量变化的影响

doi: 10.3799/dqkx.2019.153

张青全^1,2,,
潘云^1,2, ,,
宫辉力^1,2,
郑龙群^1,2,
诸云强³

1.
首都师范大学资源环境与旅游学院, 北京 100048
2.
首都师范大学水资源安全北京实验室, 北京 100048
3.
中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室, 北京 100101

基金项目:

国家自然科学基金面上项目 41771456

贵州省公益性基础性地质工作项目黔国土资地环函[2014]23号

国家重点研发计划 2017YFC0405802

详细信息

作者简介:
张青全(1995-), 男, 硕士研究生, 主要从事遥感水文方面的研究

通讯作者:
潘云

中图分类号: P343
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- 被引次数: 0
出版历程
- 收稿日期: 2019-06-12
- 刊出日期: 2019-09-15

The Impact of Different GRACE Filtering Methods on Inversing Terrestrial Water Storage Change in Southwestern Karst Area

Zhang Qingquan^{1,2
,},
Pan Yun^{1,2
, ,},
Gong Huili^1,2,
Zheng Longqun^1,2,
Zhu Yunqiang³

1.
Beijing Laboratory of Water Resources Security, Capital Normal University, Beijing 100048, China
2.
College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China
3.
State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

摘要

摘要: 不同滤波方法反演陆地水储量变化的结果不同，但目前关于西南岩溶区的不同滤波方法之间的对比研究相对较少.利用Gauss 200 km、Fan 200 km、Han 200 km和DDK4四种滤波方法反演了西南岩溶区的陆地水储量变化，并采用尺度因子进行了校正.在空间分布上，Han和Fan滤波较Gauss滤波更为平滑，但损失的真实信号更多，Han滤波损失最为严重；DDK滤波在进行南北向滤波的同时更能保持原始信号的量级和形状.在时间序列上，4种滤波的陆地水储量距平（TWSA）年趋势分别为8.64、8.77、9.05和9.39 mm/a，周年振幅分别为90.19、94.47、112.92和89.34.不同滤波反演的陆地水储量变化的空间分布差异较大；4种滤波的周年相位差别不大，且由于尺度因子的影响，校正后的陆地水储量距平振幅大小顺序为Han > Fan > Gauss > DDK.对于研究区的陆地水储量变化反演，Fan滤波和DDK滤波较好.
- GRACE /
- Gauss滤波 /
- Fan滤波 /
- Han滤波 /
- DDK滤波 /
- 陆地水储量变化 /
- 水文地质
Abstract: The results of different filtering methods for inversing changes in terrestrial water reserves are different, but there are relatively few comparative studies between different filtering methods for the southwestern karst area. This paper uses four filtering methods, namely Gauss 200 km, Fan 200 km, Han 200 km and DDK4 on the inversion of terrestrial water storage in the southwestern karst area, and uses scale factors to correct. In spatial distribution, Han and Fan filters are smoother than Gauss filters, but the loss of real signals is more, and Han filter loss is the most serious. DDK filtering can maintain the magnitude and shape of the original signal while performing north-south filtering. In the time series, the four filtered Terrestrial Water Storage Anomalies (TWSA) annual trends are 8.64, 8.77, 9.05 and 9.39, respectively. The annual amplitudes are 82.30, 87.47, 107.70 and 78.51. The spatial distribution of terrestrial water reserves inversion by different filters is quite different. The annual phase of the four filters is not much different, and due to the influence of scale factors, the order of corrected anomalous amplitude of terrestrial water storageis:Han > Fan > Gauss > DDK. For the inversion of terrestrial water storage change in the study area, Fan filtering and DDK filtering are better.
- GRACE /
- Gauss filter /
- Fan filter /
- Han filter /
- DDK filter /
- TWSC /
- hydrogeology

HTML全文

图 1 西南岩溶区分布与研究区位置

Fig. 1. Southwest karst area distribution and the location of the study area

下载: 全尺寸图片幻灯片

图 2 GRACE反演的陆地水储量变化与实测对比

Fig. 2. The comparison between GRACE inversion of terrestrial water storage changes and in situ data

下载: 全尺寸图片幻灯片

图 3 Gauss 200 km、Fan 200 km、Han 200 km、DDK4反演的陆地水储量变化（a~d）及尺度因子校正后的储量变化（e~h）

Fig. 3. The change trend of terrestrial water storage inversion of Gauss 200 km, Fan 200 km, Han 200 km, and DDK4 before(a－d)and after(e－h)the scale factor correction

下载: 全尺寸图片幻灯片

图 4 经尺度因子校正的4种滤波反演的TWSA与降水量的时间序列图

Fig. 4. Time series diagram of TWSA and precipitation by four kinds of filter inversion corrected by scale factor

下载: 全尺寸图片幻灯片

图 5 不同滤波器反演的TWSA时间序列周年振幅空间分布

Fig. 5. The annual amplitude spatial distribution of TWSA time series for different filter inversion

a.Gauss 200 km; b.Fan 200 km; c.Han 200 km; d.DKK4

下载: 全尺寸图片幻灯片

图 6 不同滤波器反演的TWSA时间序列周年相位空间分布

Fig. 6. The annual phase spatial distribution of TWSA time series for different filter inversion

a.Gauss 200 km; b.Fan 200 km; c.Han 200 km; d.DKK4

下载: 全尺寸图片幻灯片

表 1 不同滤波器反演的TWSA时间序列年趋势及其周期信息

Table 1. Annual trend of TWSA time series and its period information for different filter inversion

滤波函数	年趋势（mm/a）	周年振幅（mm）	半周年振幅（mm）	周年相位	半周年相位
Gauss 200 km	8.64	90.19	26.28	232.25°	153.73°
Fan 200 km	8.77	94.47	21.78	231.47°	150.31°
Han 200 km	9.05	112.92	16.35	228.61°	139.31°
DKK4	9.39	89.34	19.00	232.91°	158.46°

下载: 导出CSV

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