جمعه 14 اردیبهشت 1403
| عنوان مقاله | |
| عنوان مقاله |
GRACE groundwater drought index: Evaluation of California Central Valley groundwater drought |
| عنوان فارسی مقاله | شاخص خشکسالی آبهای زیرزمینی GRACE: ارزیابی خشکسالی آبهای زیرزمینی دره مرکزی کالیفرنیا |
| مشخصات مقاله انگلیسی | |
| نشریه: Elsevier |
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| سال انتشار |
2017 |
| عنوان مجله |
Remote Sensing of Environment |
| تعداد صفحات مقاله انگلیسی | 9 |
| رفرنس | دارد |
| تعداد رفرنس | 83 |
| چکیده مقاله | |
| چکیده |
Quantitative approaches to assess the complexity of groundwater drought are hindered by the lack of direct ob- servations of groundwater over space and time. Here, we present an approach to evaluate groundwater drought occurrence based on observations from NASA's Gravity Recovery and Climate Experiment (GRACE) satellite mis- sion. Normalized GRACE-derived groundwater storage deviations are shown to quantify groundwater storage de fi cits during the GRACE record, which we de fi ne as the GRACE Groundwater Drought Index (GGDI). As a case study, GGDI is applied over the Central Valley of California, a regional aquifer undergoing intensive human activities and subject to signi fi cant drought periods during the GRACE record. Relations between GGDI and other hydrological drought indices highlight our ability to capture drought delays unique to groundwater drought. Further, GGDI captures characteristics of groundwater drought that occur as a result of complex human activities and natural changes, thus presenting a framework to assess multi-driver groundwater drought characteristics. |
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