| 查看: 508 | 回复: 9 | |||
| 当前主题已经存档。 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
[交流]
请帮我看看这个摘要有什么问题，在线等，谢谢
|
|||
Abstract: It is very important to study the effects of climate change and human activities on shallow groundwater level (SGL) for groundwater resources planning and utilizing sustainably in North China Plain (NCP). Took Wuqiao in NCP for example, this paper attempted to study this effect using BP artificial neural network (BP-ANN). With correlation analysis method first, precipitation, irrigation and pumping were found to be dominant influence factors for SGL in this district. For the next step of scenario analysis, a BP-ANN regress model was then established to depict the nonlinear relationship among annual difference of SGL (AD-SGL) and the three influence factors mentioned above. Three scenarios were considered in this study, namely human activities changed only due to change in climate (S1), human activities re-changed independently based on those caused by climate change (S2), and climate condition in next 40 years projected by GCMs (S3). For S1, annual precipitation changed by and , and then annual irrigation and pumping volume vary with the precipitation accordingly. Another two BP-ANN models were built in this scenario to depict the precipitation-irrigation and precipitation-pumping mathematical relationships, with which we could calculate human activities induced by climate change.S2 were set to analyze the impact of independent-human activities on AD-GWL. For this scenario, annual irrigation and pumping volume would re-change -5% and -10% after climate-change-inducing changes in human activities in S1. For S3, future climate data were obtained from GCMS simulation results taking the consideration of the emissions scenarios of A1B, A2 and B1 (IPCC, 2001), and the two BP-ANN models built in S1 were also used to calculate climate-change-inducing changes in human activities. The results showed 1)For S1, when the range of annual precipitation change was -10% to 10%, the change in AD-SGL was from -0.72m to-0.03 m.(2)For S2, AD-SGL was less than that in S1 due to the consideration of reduction of annual irrigation and pumping volume.(3) In the emissions scenarios of A1B, A2 and B1 (IPCC, 2001), AD-SGL would be -0.02m,-0.04m and -0.01m respectively, which indicated that if active measures were not adopted,SGL in this district in next 40 years would be decline continuously. |
回复此楼» 猜你喜欢
今年春晚有几个节目很不错，点赞！
已经有6人回复
-
基金正文30页指的是报告正文还是整个申请书
已经有3人回复
-
球磨粉体时遇到了大的问题，请指教！
已经有15人回复
-
过年走亲戚时感受到了所开私家车的鄙视链
已经有5人回复
-
情人节自我反思：在爱情中有过遗憾吗？
已经有5人回复
-
江汉大学解明教授课题组招博士研究生/博士后
已经有3人回复
3楼2010-02-05 22:17:04
2楼2010-02-05 19:06:31
4楼2010-02-05 22:32:50
lengbingyu
金虫 (小有名气)
- 翻译EPI: 1
- 应助: 0 (幼儿园)
- 金币: 537.6
- 帖子: 272
- 在线: 42分钟
- 虫号: 948501
- 注册: 2010-01-25
- 性别: MM
- 专业: 英语语言学
5楼2010-02-06 19:40:02