CAJ | 학술논문

采用8种空间捕值方法对黄土高原地区降水量的空间分布进行模拟.经验证发现:年均降水量用全局多项式插值方法最佳,7月的降水量和6-9月降水量占年降水量的百分比则用局部多项式插值方法最好.由空间插值结果得出:黄土高原地区年均降水量的区域分布不均匀,由东南部的700 mm左右向两北逐渐减少至120 mm左右,多年降水量等值线呈东北-西南走向;6-9月降水量占年降水量的百分比基本上由南向北逐渐增大;7月的降水最也南东南向两北逐渐减少,由东南部的150 mm左右向西北逐渐减少至不到40 mm.
채용8충공간포치방법대황토고원지구강수량적공간분포진행모의.경험증발현:년균강수량용전국다항식삽치방법최가,7월적강수량화6-9월강수량점년강수량적백분비칙용국부다항식삽치방법최호.유공간삽치결과득출:황토고원지구년균강수량적구역분포불균균,유동남부적700 mm좌우향량북축점감소지120 mm좌우,다년강수량등치선정동북-서남주향;6-9월강수량점년강수량적백분비기본상유남향북축점증대;7월적강수최야남동남향량북축점감소,유동남부적150 mm좌우향서북축점감소지불도40 mm.
The spatial distribution of precipitation in the Loess Plateau region was evaluated with eight statistical modeling methods. Through validation, it was found that the global polynomial interpolation was the optimal method to simulate the spatial distribution of mean annual precipitation and the local polynomial interpolation method was the best one to simulate the spatial distributions of precipitation in July and the ratio of precipitation in 6-9 months to annual precipitation. It could be concluded from the approach that the distribution of annual precipitation in the study region is not uniform and the trend shows a decrease of precipitation from the southeast to the northwest (from 700 mm to 120 mm). Generally speaking, the ratio of precipitation in 6-9 months to annual precipitation increases gradually from the south to the north; the precipitation in July decreases from the southeast (150 mm) to the northwest (40 mm).