A Study on the Conservation Capacity of Different Forest Water Sources in Ziwu Mountain of Gansu Province

doi:10.13466/j.cnki.lyzygl.2020.04.013

Abstract

Abstract:

In the analysis of tree vegetation,joe irrigation vegetation,and grass-fed vegetation in Ziwu Mountain of Gansu Province,it is found that crown intercept of the coniferous mixed forest is higher than that of broad-leaf mixed forest and oil pine pure forest,and the surface runoff of the irrigation vegetation (3.24mm) and the soil erosion module (0.46 t/(km²·a)) are the smallest among them while the dry-falling layer holds the highest (19.68%),and the average annual water conservation of the soil layer (318.28mm) is higher than that of the dead-water layer (187.17mm),and the water conservation capacity of mixed forest is higher than that of pure forest. The comprehensive analysis results show that: the well-mixed forest joe irrigation grass (592.18mm) owns the strongest water conservation capacity while the pure forest vegetation of oil pine forest (376.92mm) owns the weakest. Water conservation capacity can be enhanced by the combination of planted tree species and the artificial promotion of natural renewal,and the adjustment of distribution of vegetation.

Key words: Ziwu Mountain of Gansu Province, different types, water conservation, capacity study

CLC Number:

S718.5

WEI Hongzheng, XIAO Zhan feng, HE Xiaojun, LI Shixuan, SHE Zhanjun. A Study on the Conservation Capacity of Different Forest Water Sources in Ziwu Mountain of Gansu Province[J]. FOREST RESOURCES WANAGEMENT, 2020, (4): 87-94.

Figures/Tables 5

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References 12

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林分及植被类型	年树冠截持量	年林内穿透降雨量	年树干径流总量	年林外降雨总量
针阔混交林乔灌草植被	85.42	511.54	93.84	690.8
针阔混交林乔灌植被	85.21	511.88	93.71	690.8
针阔混交林乔木植被	84.33	512.84	93.63	690.8
阔叶混交林乔灌草植被	82.11	533.93	74.76	690.8
阔叶混交林乔灌植被	82.04	534.37	74.39	690.8
阔叶混交林乔木植被	81.78	534.95	74.07	690.8
油松纯林乔灌草植被	48.75	564.58	77.47	690.8
油松纯林乔灌植被	48.64	564.74	77.42	690.8
油松纯林乔木植被	48.30	565.23	77.27	690.8
平均	71.84	537.12	81.84	690.8

林分类型	植被类型	年降雨总量 /mm	雨量计自记值合计 /mm		地表径流总量 /mm		一次径流过程泥沙总量/g		土壤侵蚀模数/ t/(km²·a)
针阔混交林	乔灌草植被	690.8	51609.6		3.24		45.54		0.46
	乔灌植被	690.8	595877.6		37.42		526.49		5.26
	乔木植被	690.8	980294.2		61.56		868.61		8.69
阔叶混交林	乔灌草植被	690.8	294034.8		18.46		259.61		2.60
	乔灌植被	690.8	861769.4		54.12		761.97		7.62
	乔木植被	690.8	1577298.5		99.05		1399.58		14.00
油松纯林	乔灌草植被	690.8	1159783.4		72.83		1026.20		10.26
	乔灌植被	690.8	1647861.6		103.48		1461.16		14.61
	乔木植被	690.8	2585876.0		162.39		2299.39		22.99
不分林分 (平均值)	乔灌草植被	690.8	501809.3		31.51		443.78		4.44
	乔灌植被	690.8	1035169.6		65.01		916.54		9.17
	乔木植被	690.8	1714489.6		107.67		1522.53		15.23
不分植被 (平均值)	针阔混交林	690.8	542593.8		34.07		480.21		4.80
	阔叶混交林	690.8	911034.2		57.21		807.05		8.07
	油松纯林	690.8	1797840.4		112.90		1595.58		15.96
平均值				68.06		960.95		9.61

林分植被类型	枯落物未分解层		枯落物半分解层		枯落物已分解层		土壤容重/ (g/cm³)	土壤饱和含水重量/(g/cm³)	土壤饱和含水率/%
林分植被类型	厚度/mm	持水率/%	厚度/mm	持水率/%	厚度/mm	持水率/%	土壤容重/ (g/cm³)	土壤饱和含水重量/(g/cm³)	土壤饱和含水率/%
针阔混交林乔灌草植被	4	6.2	19	10.4	57	21.3	4.078	6.543	60.4
针阔混交林乔灌植被	3	6.1	16	10.2	49	20.7	4.081	6.542	60.3
针阔混交林乔木植被	2	5.8	12	9.4	40	19.9	4.104	6.538	59.3
阔叶混交林乔灌草植被	3	6.0	17	9.9	53	21.0	4.096	6.537	59.6
阔叶混交林乔灌植被	3	5.3	15	9.1	47	20.2	4.108	6.532	59.0
阔叶混交林乔木植被	2	5.4	11	8.8	39	19.3	4.133	6.529	58.0
油松纯林乔灌草植被	3	5.1	14	8.5	42	19.1	4.162	6.514	56.5
油松纯林乔灌植被	3	3.6	11	7.7	35	18.4	4.233	6.509	53.8
油松纯林乔木植被	2	2.9	6	6.6	28	17.2	4.289	6.511	51.8
平均值	3	5.2	13	9.0	43	19.68	4.143	6.528	57.6

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