| Effects of ecological water conveyance on recovery value of vegetation in the lower reaches of Tarim river |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2017.04.24 |
| Key Words: recovery value of vegetation groundwater ecological water conveyance the lower reaches of Tarim River |
| Author Name | Affiliation | | WANG Xi-yi | Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China | | XU Hai-liang | Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China | | LING Hong-bo | Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China | | ZHAO Xin-feng | Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China | | PAN Cun-de | Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | WANG Chu-han | Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China |
|
| Hits: 1558 |
| Download times: 1087 |
| Abstract: |
| The effects of ecological water conveyance on the recovery value of vegetation in the lower reaches of Tarim river was investigated on the basis of change in biomass of surface vegetation caused by groundwater dynamic change after ecological water conveyance. The long-term monitoring data on groundwater dynamic change and responsiveness of surface vegetation before and after the ecological water conveyance were referenced in the study. The Kaogan section in the lower reaches of Tarim River was selected as the test area. The monitoring and weighing data on the vegetation in October 2000, September to October 2007 and October 2015 were collected in the belt transect, which was 2000 meter long in the way perpendicular to the river channel, and 100 meter wide in the way parallel to the river channel. The computing methods of ecological value quantization home and abroad were referenced, and the response value of surface vegetation and potential value of groundwater lifting were used in calculating the recovery value of surface vegetation after the water conveyance. The results are as follows: ① In the lower reaches of Tarim River, there was an obvious lift in groundwater level because of the ecological water conveyance, and the lift range of groundwater level decreased with the increase in the distance from river, and the same was true for the vegetation coverage; The changes of groundwater level and vegetation coverage were not obvious in the distance 1000 meter away from the river. ② The newly added biomass from 2000 to 2007 accounted for a proportion of 57.02% to the newly added biomass from 2000 to 2015; In addition, the newly added biomass in this two period were all correlated to the distances from river significantly. ③ According to 16 groups of monitoring data of ecological water conveyance, in the period from 2000 to 2007 and the period from 2000 to 2015, the value of water resource invested because of water conveyance at the belt transect were 8 266.5 yuan and 14 805 yuan respectively, and the whole recovery value of vegetation after water conveyance were 53 811.67 yuan and 83 334.62 yuan, with the input-output ratio being 1∶6.507 and 1∶5.63 respectively, which indicated the economic benefit of ecological water conveyance was very obvious. |
|
|
|