دورية أكاديمية
Retrieving Soil Moisture in the First-Level Tributary of the Yellow River–Wanchuan River Basin Based on CD Algorithm and Sentinel-1/2 Data
| العنوان: | Retrieving Soil Moisture in the First-Level Tributary of the Yellow River–Wanchuan River Basin Based on CD Algorithm and Sentinel-1/2 Data |
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| المؤلفون: | Xingyu Liu, Xuelu Liu, Xiaodan Li, Xiaoning Zhang, Lili Nian, Xinyu Zhang, Pengkai Wang, Biao Ma, Quanxi Li, Xiaodong Zhang, Caihong Hui, Yonggang Bai, Jin Bao, Xiaoli Zhang, Jie Liu, Jin Sun, Wenting Yu, Li Luo |
| المصدر: | Water, Vol 15, Iss 19, p 3409 (2023) |
| بيانات النشر: | MDPI AG, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Hydraulic engineering LCC:Water supply for domestic and industrial purposes |
| مصطلحات موضوعية: | Wanchuan River basin, Sentinel-1/2, CD algorithm, soil moisture mapping, NDVI, Loess Plateau of Northwest China, Hydraulic engineering, TC1-978, Water supply for domestic and industrial purposes, TD201-500 |
| الوصف: | Lanzhou is the only provincial capital city in Northwest China where the main stream of the Yellow River and its tributaries flow through the city. Due to its geographical location and the influence of various factors, it is difficult to evaluate and simulate the climatic, hydrological, and ecological processes of the main stream of the Yellow River and its tributaries in the region. In this study, the Wanchuan River basin, currently undergoing ecological restoration, was selected as the study area. Seasonal backscatter differences generated using Sentinel-1/2 (S1/S2) data and the CD algorithm were used to reduce the effects of surface roughness; vegetation indices, soils, and field measurements were used to jointly characterize the vegetation contribution and soil contribution. Then, SM maps with a grid spacing of 10 m × 10 m were generated in the Wanchuan River basin, covering an area of 1767.78 km2. To validate the results, optimal factors were selected, and a training set and validation set were constructed. The results indicated a high level of the coefficient of determination (R2) of 0.78 and the root mean square error (RMSE) of 0.08 for the comparison of measured and inverted water contents, indicating that the algorithm retrieved the SM values of the study area well. Furthermore, Box line plots with ERA5-Land and GLDAS confirmed that the algorithm is in good agreement with current SM products and feasibility for soil water content inversion work in the Wanchuan River basin. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2073-4441 |
| Relation: | https://www.mdpi.com/2073-4441/15/19/3409; https://doaj.org/toc/2073-4441 |
| DOI: | 10.3390/w15193409 |
| URL الوصول: | https://doaj.org/article/c6e4d6a4cac54081b5de5f0a5f6dac8f |
| رقم الأكسشن: | edsdoj.6e4d6a4cac54081b5de5f0a5f6dac8f |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 20734441 |
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| DOI: | 10.3390/w15193409 |