某桥水库灌区渠系建筑物统计表渠系渡槽倒虹管总计83.972596844048125930干渠27.772596844048125930支渠56.2表4-1渠线长度(km)建筑物分类跌水(座)暗涵(座)泄洪闸（座）节制闸（座）分水闸（座）测流设施(座)公路桥(座)生产桥（座）(座)长度(m)(座)长度(m)某桥水库灌区历年实灌面积年实灌面积年实灌面积年实灌面积年实灌面积196419755.819865.519975.219657.2919765.619874.819985.819666.9519776.519884.519995.119676.3719786.219895200021968619795.41990620016.319695.31980619914.22002319706.819816.519924.71971719824.319934.319725.619833.519944.819736.119844.31995519746.319855.719965.3平均6.4单位：万亩表4-2单位：万亩大观桥水库灌区土地利用现状表灌区耕地林地水面荒地京山灌区5.82.8949.80.6511.21.4124.30.712.1天门灌区10.14.8347.80.76.541.8918.71.4514.37合计15.97.7297.61.3517.743.3432.1526.47表4-3土地总面积(万亩）面积(万亩）占土地面积(%)面积(万亩）占土地面积(%)面积(万亩)占土地面积(%)面积（万亩）占土地面积(%)灌区范围其中水田旱田水稻棉花花生玉米豆类蔬菜沙梨油菜小麦绿肥其它2.892.380.512.380.180.030.050.050.22.895.1282.317.782.36.241.041.741.746.93100177.24.834.030.84.030.080.080.10.120.320.14.838.6983.416.683.41.661.662.082.496.632.08100179.97.726.411.316.410.260.110.150.170.520.17.7213.818317833.381.431.942.26.741.31100178.89大观桥水库灌区2000年农作物种植结构表4-4有效灌溉面积(万亩)农作物种植种类面积(万亩)小计(万亩)播种面积(万亩)京山县+A15(万亩)占耕地面积%天门市(万亩)占耕地面积%灌区合计(万亩)占耕地面积%灌区范围其中水田旱田水稻棉花花生玉米豆类蔬菜沙梨油菜小麦绿肥其它2.8920.8920.20.030.080.080.250.252.895.369.230.869.26.921.042.772.778.658.65100183.44.833.81.033.80.10.080.120.120.270.344.838.7278.721.378.72.071.652.482.486.587.04100180.57.725.81.925.80.30.110.20.20.520.597.7214.0275.124.975.13.91.422.592.596.757.65100181.6大观桥水库灌区2010年农作物种植结构表4-5有效灌溉面积(万亩)农作物种植种类面积(万亩)小计(万亩)播种面积(万亩)京山县+A30(万亩)占耕地面积%天门市(万亩)占耕地面积%灌区合计(万亩)占耕地面积%灌区范围其中水田旱田水稻棉花花生玉米豆类蔬菜沙梨油菜小麦绿肥其它2.891.71.191.70.20.030.10.10.30.30.162.895.0158....
