contour n. 1.外形,轮廓;周线,轮廓线。 2.等高线,恒值线;【电视】等场强线(=contour-line)。 3.概略,大要;形势。 4.【电学】回路。 the irregular contour of the coast 曲折的海岸线。 the contours of things 情势。 adj. 1.与轮廓相合的。 2.(表示[循着])等高线的。 vt. 1.描画…的轮廓;画…的等高[等值]线。 2.顺等高线(作业)〔如开沟,筑路等〕。
On the basis of analyzing factor ( soil particle composition , soil bulk density , water stable aggregate content , antecedent soil moisture , slope gradient , rain intensity , accumulation depth and soil crust , soil and water conservation tillage measures ) affecting soil infiltration rates , several relation models was obtained ; analyzed in detail different soil and water conservation tillage measures intensifying infiltration rates , while there have the same rainfall condition , the increasing infiltration rates of contour tillage and artificial digging and artificial hoeing in gully areas of loess plateau are 67 % and 41 % and 29 % ; the increasing infiltration rates in hilly areas of loess plateau is 45 % and 22 % and 14 % 在相同的降雨条件下,黄土高原沟壑区等高耕作与直线坡相比,可提高入渗67 ,人工掏挖可提高入渗41 ,人工锄耕可提高入渗29 ;黄土丘陵沟壑区等高耕作可提高入渗45 ,人工掏挖可提高入渗22 ,人工锄耕可提高入渗14 。并根据黄土高原超渗产流的概念和水量平衡方程,建立了不同水土保持耕作措施强化入渗速率模型。