摘要
文中采用对数正态分布模型,通过对塔里木河下游地区进行野外实地监测,建立了研究区内建群植物-胡杨与柽柳盖度和地下水埋深之间的关系模型,并依据输水次数和地下水埋深的变化对研究区内建群物种的潜在盖度进行了模拟。结果表明:1)胡杨最适地下水位与平均地下水位分别为2.43m和4.58m,而柽柳的为2.31m和3.53m;2)模型所计算的结果与黑河流域额济纳旗地区相一致,准确度较高,具有一定的实用性;3)在研究区内,胡杨和柽柳潜在的盖度分别为16.98%和17.24%,与实测值之间没有显著性的差异,造成这些微小差异的原因主要是人类活动和气候变化的影响。
In this research,we did some field survey for Populus euphratica and Tamarix chinensis in the lower reaches of Tarim river. We established a relational model between the coverage of two species and groundwater level according to the Lognormal distribution model; then,simulated the potential coverage used for the frequency of water conveyance and the changes of groundwater level. The results were as follows: 1) The optimum groundwater level and the average groundwater level of Populus euphratica is 2. 43 m and 4. 58 m respectively,what to Tamarix chinensis is 2. 31 m and 3. 53 m. 2) The results,calculated by model,is corresponded with that at Ejin Banner in Heihe river basin. Therefore,this model has a high degree of accuracy,and some definite practicability. 3) In the study area,the potential coverages of Populus euphratica and Tamarix chinensis,may mainly affected by human activity and climate changes,are of 16. 98% and 17. 24% respectively,has some differences to survey results.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2015年第12期104-108,共5页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金(41171427
41471099
31370551
31400466)
中国科学院"西部之光"人才培养计划(XBBS-2014-13)
荒漠与绿洲生态国家重点实验室自主课题资助
关键词
动态耦合模拟
建群植物
盖度
地下水位
塔里木河下游
dynamic coupling simulation
dominant species
coverage
groundwater level
the lower reaches of Tarim river