The Impact Of River Runoff On Radial Growth Of Populus Euphratica In The Tarim River

In this study, desert riparian forest plant Populus Tarim River is the main objectof study, combined with groundwater level data and River runoff data for eachmonth, using regression analysis, correlation analysis and MK inspection ofmathematical statistics.(1)By Alar hydrological station, the xinquman hydrological station, Yingbazhahydrological stations, hydrological station wusiman monthly runoff and annualrunoff were analyzed and found mainly in the monthly runoff7,8,9month, of which8January runoff reached the highest value of the year. Chara section focused onmonthly runoff8,9,10month, which in September runoff reached the highest valueof the year. Hydrological stations in the1960s a higher runoff, to2000and thengradually reduce the amount of water each section over which the more diminishingrunoff downstream more obvious chara is five hydrological stations sharpestdecrease runoff hydrological station.(2) The radial increment of Populus euphratica，changes significantlyat the fourtransects in the upstream and midstream of the Tarim River. There appeared a peakvalue in the1980-1990s, and then the value shows a gradually decreasing trend. Theannualradial increment of two transections in the lower Tarim Riverchanged littlebefore2000, while the value begin to increase greatly after2000.(3) arim xiaojiake, xinquman, Aqike, yingsu and the yiganbujima in accordancewith the dry section of Populus radial growth of less than hemp mutations occur in1996,1999,1991,2000,1998and1960, respectively1968or1978.(4) Populus growth there is a certain lag effect on runoff reflect on this articleTarim Populus radial growth of the middle reaches1to2months and then runoffhighest positive correlation, while Populus growing season is from4to9, so fromtree-ring hydrology perspective,1to2runoff volume, the effects of groundwaterPopulus growth there is a certain lag, so in the early growth of Populus moreadequate moisture, more conducive to the formation of a wide wheel. YingsuPopulus radial growth of1to2months and then the highest negative correlationrunoff, according to Populus downstream radial growth and runoff data indicate thatmutations in Populus radial growth occurred in1998,1to2monthly runoff less thannormal, but the downstream runoff decreased, but the yingsu section of the reservoirfrom the Daxihaizi recently, ecological water can reach the head, high water table,the2000emergency water radial significant growth trend growth, resulting in anegative correlation trend.