sparse adj. 1.(树木分布等)稀的;(交通车辆等)稀疏的。 2.(人口、毛发等)稀少的。 3.(雨量)稀缺的;瘦小的。 sparse beard 稀疏的胡须。 a country of sparse population 人口稀少的小国。 n. -sity ,-ly adv.,-ness n.
vegetation n. 1.【植物;植物学】营养体生长,发育;〔集合词〕植物,植被,植生,草木。 2.无所作为的生活,单调的生活。 3.【医学】赘生物,增殖体。 natural vegetation自然植被。 tropical vegetation热带植物。 the luxuriant vegetation 茂盛的草木。 adj. -al
The driest region , in the extreme southwest , has active sand dunes and very sparse vegetation 最西南端是最干旱地区,沙丘遍布,植被稀少。
Secondly , typical approaches of studying on vegetation have included radiative transfer , four - stream , geometric optics , hybrids of two or more of these , and numerical simulation . then we introduced several models for density or sparse vegetation , soil and desert 然后,简单论述了建立植被散射模型的发展动态和几种典型方法:辐射传输模型、四通量模型、几何光学模型以及复合模型等,初步研究了用于稠密植被、稀疏植被、土壤、沙漠等环境背景的双向反射函数模型。
8 ndvi value in oasis is significantly higher than the value in desert , both of them have different rules in monthly variation . irrigation temperature and precipitation have effect on variation of ndvi in oasis , the correlation coefficients of sparse vegetation ndvi in desert with climatic and hydrological factors are insignificant and meaningless in practice . the drive factors of oasis ndvi are only adapted on oasis in arid land and are not fit to desert system in arid land 8 、绿洲ndvi值显著大于荒漠,二者具有不同的季节变动规律;灌溉、气温和降水是绿洲ndvi变化的驱动因子,荒漠稀疏植被ndvi与绿洲气侯、水文因子相关不显著或无实际意义;绿洲ndvi的驱动因子只适用于干旱区的绿洲区域,而不适用于干旱区荒漠系统。