三峡区间流域TMPA 3B43V7卫星降水产品多时空尺度精度评估

Accuracy Assessment of TMPA 3B43V7 Satellite Precipitation Products in Three Gorges Region Basin at Multiple Spatiotemporal Scales

卫星降水产品属于间接估测降水,需要进行精度评估、适用性分析才能使用。利用地面站点观测数据评估了三峡区间流域TMPA 3B43V7卫星降水产品的年、月时间尺度及格点、流域空间尺度下的精度。结果表明,TMPA 3B43V7降水产品在月尺度上精度较高,在年尺度上数据精度稍差,但具有应用在降水变化特征分析、流域水文过程模拟等领域的潜力。

Satellite precipitation products are indirectly estimated precipitation, and need to be evaluated accuracy and applicability analysis for further application. Based on the observation data of ground stations, the accuracy of TMPA 3B43V7 precipitation products in the Three Gorges Region basin is assessed at the annual and monthly timescales as well as the ground and watershed spatial scales. The results show that the TMPA 3B43V7 precipitation products have higher precision on the monthly scale, and the data accuracy is slightly worse on the annual scale, but they all have potentials in the fields of precipitation variation characteristics analysis and basin hydrological process simulation.