It is a non - propelled crane ship after conversion , operating in ports and calm waters , deploying towing in chinas coastal class ii navigational area and suitable for salvage of sunken ships , harbour construction , lifting of bridge beams sections for erection , loading unloading heavy cargoes as well as offshore oil drilling production platform and other offshore hook - up 本船改建后为非自航固定式起重船，以港口及平水区域作业为主，可在我国沿海ii类航区中调遗拖航，适用于打捞船舶港口建设桥梁吊装装卸重大物件，以及海上石油钻井采油平台和其他海上吊装工程。
/ based on the trends of present cropping development and irrigation efficiency increase in the region , water supply can meet irrigation by 89 % in 2010 , 75 % in 2020 and 70 % in 2030 to crop ' s water requirement under normal condition . water supply can meet irrigation by 100 % in 2010 , 88 % in 2020 and 83 % in 2030 to 85 % of crop ' s water requirement under normal condition . the situation of water shortage in the region is more austere in dry year 3 )按目前种植业发展趋势并考虑到灌溉效率的提高，平水年在100充足灌溉方式下， 2010年、 2020年和2030年可供水量对灌溉的满足率分别为89 、 75和70 ；在85亏缺灌溉方式下， 2010年供水可以满足需要， 2020年和2030年供水量对灌溉的满足率为88和83 ；干旱年度的灌溉满足率更低，形势更为严峻。
Normally water resources is affected by human activities and climatic change , but it is affected mainly by climatic change in runoff forming regions located in the high and middle mountainous area in the northwestern china . river runoff in the hexi inland arid region all originates from the qilian mt . area and the change of mountainous runoff resulted from global weather warming up and will bring an important effect to the development of society and economy in the hexi region . so the response on mountainous runoff and its changing trends are analyzed on the basis of the measured data of precipitation , air temperature , and discharges observed from some weather and hydrologic stations in the studied area . the results show that seasonal variation of mountainous runoff in the hexi inland region is mainly affected by the river ' s geographical location and supply source , and the yearly change by precipitation and that in the west of the region by air temperature besides precipitation . there are some obviously regional differences in the influences of climatic change on surface runoff in the hexi inland arid region , that is , rivers runoff in the west of the hexi area have been increasing and rivers in the east part have been decreasing , and the rivers runoff in the central part presented slowly increase trend , such as the heihe river , but it is not quite obvious 一般情况下,水资源的变化主要受气候变化和人类活动的影响,但在位于我国西北内陆干旱地区的中高山地带,径流的形成主要受前者的影响.甘肃省的河西内陆干旱区是该省重要的工农业生产和经济开发区,这里各项社会和经济活动与出山径流的变化都有着十分密切的关系.因此,笔者根据有关水文气象台站的降水、气温和径流观测资料,分析了以黑河、昌马河、西营河等主要河流为代表的河西内陆区出山径流的变化特征与规律.结果表明,河西内陆区出山口径流的季节变化主要受地理位置和河流补给来源的影响,而年际变幅则受山区降水量年际变化及变幅的影响十分明显.目前,梨园河以西河流水量处于上升阶段,梨园河以东的河流则处于下降的阶段;以黑河干流莺落峡水文站年径流为代表的走廊中部地区的出山口径流正处于1990年开始的枯水段的上升段.但总体而言,河西内陆干旱区出山口径流的变化相对比较稳定.预计今后若干年内,河西内陆干旱区东段河流出山口径流的变化以偏枯为主,中段、西段河流出山口径流的变化以平水或平水偏丰为主
The results are as follows : ( 1 ) if we increase the pumping water by 493 x 104m3 , the amount of leakage recharge of rubber dam will rise by 231x 104m3 ; which indicates pumping by rubber dam can excite much more surface water infiltrate so as to supply groundwater . thus the utilization ratio of water source is increased , and it provides the reliable guaranty for enough supply of the groundwater storage in wet year . ( 2 ) under the condition of present status , the groundwater exploitable resource in wet year is 3670 104m3 最后，通过数值法反复调算计算出本区地下水的允许开采量，计算结果表明，在现状开采的条件下，大沽河地下水库丰水年( p = 20 )时地下水允许开采量为13670 10 ~ 4m ~ 3 ，平水年( p = 50 )时地下水允许开采量为12054 10 ~ 4m ~ 3 ，枯水年( p =加% )时地下水允许开采量为10951xl了砰。
