The rapid increase of paddy field acreage has led to widely descending of groundwater level in well irrigation paddy area of low-lying wetland in the Sanjiang Plain recent years. More and more "hanging pump" and partial overpumping have been occurring in well irrigation paddy area of low-lying wetland. Therefore, the groundwater resource balance in the Sanjiang Plain need to be recharged urgently. In order to solve above-mentioned problems, the authors took Farm 853 as example, analyzed the multi-time scales variation characteristics and jump characteristics of actual annual precipitation time series in Farm 853 through using the wavelet theory, and the main periods of annual precipitation change and variation trend of drought-flood in this area were revealed. The study can provide scientific gist for fully utilizing natural precipitation, groundwater resource recharge and sustainable utilization in Farm 853 so much as the entire Sanjiang Plain.
LIU Dong, FU Qiang
. Variation Trend Analysis of Annual Precipitation Series Based on Wavelet Transform in Well-Irrigation Area of Low-lying Wetland in Sanjiang Plain[J]. SCIENTIA GEOGRAPHICA SINICA, 2008
, 28(3)
: 380
-384
.
DOI: 10.13249/j.cnki.sgs.2008.03.380
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