基于径流还现的洮河流域径流变化特征研究

doi:10.12118/j.issn.1000–6060.2021.01.16

Abstract

Abstract:

The calculation of current river runoff is not only the basis of accurately reflecting regional water resources but is also the important basis of water resource planning and decision-making. Runoff reduction was divided into “forward reduction” and “backward reduction”. “Forward reduction” referred to the reduction calculation of the measured annual runoff series into the natural annual runoff series before a large number of water conservancy projects were built in the basin. “Backward reduction” referred to the conversion of the natural annual runoff series of each representative station in the region to the annual runoff series under the current conditions, i.e., the current calculation. The “forward reduction” evaluation results reflect the natural state of the water resources in the basin. With the rapid development of human economy and society, a large number of water conservancy projects have been built, and the regional underlying surface conditions have been much changed, so they cannot be returned to the natural state. Therefore, the results cannot be used directly in the planning, design, and decision-making of water conservancy projects. The current runoff calculation can truly reflect the construction and utilization of water conservancy projects and provide technical support for scientific and rational allocation and sustainable development of regional water resources. The Taohe River is the largest tributary in the upper reaches of the Yellow River. However, with the change in climate and human activities on the underlying surface, the runoff of the Taohe River has decreased significantly in the past two decades. The Lijiacun and Hongqi hydrological stations in the Taohe River Basin were selected for the basic data, the current runoff in the Taohe River Basin was calculated using the results of the reduction calculation, and the characteristics of runoff change were studied. The results showed that from 1956 to 2016, the average annual measured runoffs of the Lijiacun and Hongqi stations in the Taohe River Basin were 39.52×10 ⁸ m³ and 44.66×10⁸ m³, respectively. After the reduction calculation, the average annual natural runoffs were 39.69×10⁸ m³ and 46.11×10⁸ m³, respectively. The average annual reduction water volumes were 0.17×10⁸ m³ and 1.45×10⁸ m³, respectively. These two water consumption stations are mainly used for agriculture. The anomaly change trends of the average natural runoff in the two stations were the same, and the anomaly change point was 1990. The corrected current runoff amounts at the Lijiacun and Hongqi stations were 31.76×10⁸ m³ and 38.77×10⁸ m³, respectively, and the revised amounts were 7.93×10⁸ m³ and 7.04×10⁸ m³, respectively. The runoffs of the Lijiacun and Hongqi stations decreased by 20% and 15%, respectively. At present, the annual runoff of the Lijiacun station shows a slight increasing trend, whereas the annual runoff of the Hongqi station shows a slight decreasing trend. The interannual changes of runoff in the 1950s and 1970s—1990s were lower than the multiyear average runoff, of which that of the 2110s was higher than the multiyear average runoff. The research results provide basic support for the investigation and evaluation of water resources in the basin and have important practical reference significance for promoting regional integrated water resource management and scientific deployment, guiding regional integrated water resources planning and socio-economic development.

Key words: Taohe River Basin, natural runoff, current runoff the calculation, variation characteristics

NIU Zuirong,WANG Qiyou,SUN Dongyuan,ZHANG Rui,WU Xue,XING Yunpeng,ZHAN Shijie. Runoff variation characteristics of Taohe River Basin based on calculation of current runoff[J].Arid Land Geography, 2021, 44(1): 149-157.

Figures/Tables 9

Tab. 1

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Tab. 3

References 28

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站名	坐标		集水面积/km²	控制面积/km²	选用雨量站数	平均面降水量/mm
站名	东经/E	北纬/N	集水面积/km²	控制面积/km²	选用雨量站数	1956—2000年	1956—2016年	相对值/%
李家村	103°49′	35°16′	19693	19684.3	34	580.8	583.4	0.40
红旗	103°34′	35°48′	24973	24952.5	60	571.9	572.1	0.03

降水量/mm	李家村站			红旗站
降水量/mm	y=0.7181x-190.68	y=0.4547x-101.23	修正系数	y=0.6804x-186.22	y=0.4425x-95.41	修正系数
300	24.750	35.184	1.4216	17.90	37.340	2.0860
350	60.655	57.919	0.9549	51.92	59.465	1.1453
400	96.560	80.654	0.8353	85.94	81.590	0.9494
450	132.465	103.389	0.7805	119.96	103.715	0.8646
500	168.370	126.124	0.7491	153.98	125.840	0.8172
550	204.275	148.859	0.7287	188.00	147.965	0.7870
600	240.180	171.594	0.7144	222.02	170.090	0.7661
650	276.085	194.329	0.7039	256.04	192.215	0.7507
700	311.990	217.064	0.6957	290.06	214.340	0.7390

时段	平均值/10⁸ m³		最大值/10⁸ m³		年份		最小值/10⁸ m³		年份		极值比		距平百分率/%		年景
时段	李家村	红旗	李家村	红旗	李家村	红旗	李家村	红旗	李家村	红旗	李家村	红旗	李家村	红旗	李家村	红旗
1956—1959年	26.40	32.93	34.16	43.83	1959	1959	19.78	24.63	1957	1957	1.73	1.78	-20.30	-17.73	特枯水年	偏枯水年
1960—1969年	36.77	45.17	55.83	72.20	1967	1967	21.76	26.04	1969	1969	2.57	2.77	13.63	14.17	偏丰水年	偏丰水年
1970—1979年	30.44	37.48	41.65	50.75	1976	1978	20.27	24.40	1971	1971	2.05	2.08	-4.34	-3.44	平水年	平水年
1980—1989年	30.62	38.06	41.61	50.97	1984	1984	21.40	28.95	1988	1988	1.94	1.76	-3.72	-1.87	平水年	平水年
1990—1999年	31.28	35.85	43.92	50.32	1992	1992	22.26	27.08	1991	1997	1.97	1.86	-1.53	-8.15	平水年	平水年
2000—2009年	31.31	38.13	48.78	56.80	2005	2005	19.55	24.54	2002	2002	2.50	2.31	-1.44	-1.68	平水年	平水年
2010—2016年	33.45	40.89	48.24	58.38	2012	2012	24.01	31.02	2016	2016	2.01	1.88	5.05	5.18	平水年	平水年
1956—2016年	31.76	38.77	55.83	72.20	1967	1967	19.55	24.40	2002	1971	2.86	2.96

Runoff variation characteristics of Taohe River Basin based on calculation of current runoff

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