关键词: 黄河中游, 水储量, GRACE时变重力场, 水量平衡

Abstract: This study targets the middle reaches of the Yellow River Basin where the huge changes have been taking place in the water cycle process. By constructing GRACE satellite gravitational field model, the water storage changes in the middle reaches of the Yellow River Basin were inverted and the result was validated. The result derived from GRACE satellite and that from water balance model show the same temporal trend of water storage change, the square of the correlation coefficient being 0.82. The amount of water storage over the middle reaches of the Yellow River Basin had an increasing trend from 2003 to 2012, and the average annual increasing amount was water storage change equivalent water depth. The increase of water storage was caused by the decrease in runoff loss in the middle reaches of the Yellow River Basin, that the average annual decreasing amount was 2.93 mm equivalent water depth. There was obvious spatial variation of the water storage change. The most obvious increasing of water storage is at Longmen-Sanmenxia section, where the average annual increasing amount was 4.59 mm equivalent water depth. The second is at the Hekou-Longmen section, where the average annual increasing amount was 3.47 mm equivalent water depth. And the last one is at Sanmenxia-Huayuankou section, where the average annual increasing amount was 2.71 mm equivalent water depth.

Key words: the middle of the Yellow River Basin, water storage, GRACE time variable gravitation model, water balance