Tc.xlsx

	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U
1	Name	Area Km2	CN	Longest flowpath L (km)	Basin slop Y	S	L (ft)	Y (%)	Tc h (NRSC)	Lag (hr)	Lag (min)	Tc h (Ventura, Italy)	Tc h (Passini, Italy)	Tc h (Kirpich) (central Europe)	Tc h (UK, NERC 1975)	Tc h (Dooge) (Ireland)	Tc h (Temez) (Spain)	Tc h (SCS Lag Equation (1972))			In Kirpich (1940) empirical formula the coefficient is 0.2 in the case of central Europe.
2	Subbasin-1	11.473	84.8	7.02466	0.06973	1.79245283	22541.00999	6.973	2.070	1.242	74.517	1.631	1.764	2.502	2.581	1.561	2.189	2.074	84.8	74.5172134377114
3	Subbasin-10	10.493	75.2	7.18072	0.18886	3.29787234	23041.78156	18.886	1.731	1.039	62.319	0.948	1.048	1.734	2.064	1.270	1.842	1.735	75.2	62.3186388472043
4	Subbasin-11	15.401	74.6	8.65159	0.2164	3.404825737	27761.56806	21.64	1.910	1.146	68.750	1.073	1.184	1.899	2.182	1.453	2.068	1.914	74.6	68.7502572457746
5	Subbasin-12	39.606	78.2	15.87869	0.1147	2.787723785	50952.17562	11.47	3.836	2.302	138.105	2.363	2.726	3.870	3.369	2.384	3.702	3.844	78.2	138.105488220736
6	Subbasin-13	15.508	70.7	8.61963	0.25333	4.14427157	27659.01353	25.333	1.962	1.177	70.624	0.995	1.095	1.782	2.099	1.418	2.002	1.966	70.7	70.6236905172986
7	Subbasin-14	16.394	75.8	11.07616	0.14015	3.192612137	35541.62525	14.015	2.793	1.676	100.561	1.375	1.631	2.715	2.714	1.605	2.710	2.799	75.8	100.561144203857
8	Subbasin-15	12.748	81.9	6.80143	0.09862	2.21001221	21824.70064	9.862	1.870	1.122	67.318	1.446	1.520	2.135	2.344	1.537	2.000	1.874	81.9	67.3175754390357
9	Subbasin-16	10.64	74.8	7.43841	0.10598	3.368983957	23868.66754	10.598	2.404	1.443	86.559	1.274	1.422	2.225	2.403	1.409	2.112	2.409	74.8	86.5594617437705
10	Subbasin-17	36.532	72.5	14.3275	0.25496	3.793103448	45974.6551	25.496	2.795	1.677	100.602	1.522	1.720	2.629	2.661	2.013	2.942	2.800	72.5	100.602360212164
11	Subbasin-18	16.225	82.7	9.67438	0.08204	2.091898428	31043.53752	8.204	2.647	1.588	95.306	1.788	2.031	3.006	2.888	1.750	2.707	2.653	82.7	95.3058239521455
12	Subbasin-19	9.2706	71.6	5.91075	0.26023	3.966480447	18966.65103	26.023	1.397	0.838	50.274	0.759	0.803	1.319	1.747	1.143	1.495	1.399	71.6	50.2742502349852
13	Subbasin-2	11.233	86.3	7.9939	0.0651	1.587485516	25651.14608	6.51	2.252	1.351	81.079	1.670	1.893	2.837	2.788	1.566	2.447	2.257	86.3	81.0787647267664
14	Subbasin-20	27.462	76.2	11.21862	0.09792	3.12335958	35998.7566	9.792	3.337	2.002	120.135	2.130	2.327	3.148	2.970	2.107	2.930	3.344	76.2	120.134513491375
15	Subbasin-21	10.216	72.3	8.31565	0.1089	3.831258645	26683.59035	10.89	2.782	1.669	100.166	1.232	1.437	2.399	2.517	1.380	2.287	2.788	72.3	100.16622878643
16	Subbasin-22	28.511	81.5	11.43593	0.0979	2.26993865	36696.06962	9.79	2.881	1.729	103.724	2.170	2.371	3.195	2.997	2.140	2.973	2.887	81.5	103.724098192084
17	Subbasin-23	41.887	75.7	10.82616	0.1912	3.21003963	34739.41525	19.12	2.355	1.413	84.784	1.882	1.894	2.367	2.496	2.236	2.511	2.360	75.7	84.7836359611764
18	Subbasin-24	20.014	76.5	12.82913	0.13633	3.071895425	41166.62551	13.633	3.121	1.873	112.356	1.541	1.856	3.073	2.927	1.750	3.046	3.127	76.5	112.355872889635
19	Subbasin-25	32.392	82.1	10.27704	0.09284	2.180267966	32977.37703	9.284	2.664	1.598	95.902	2.375	2.452	3.003	2.886	2.275	2.769	2.669	82.1	95.9019795096056
20	Subbasin-26	32.599	77.4	19.27413	0.09522	2.919896641	61847.59931	9.522	5.036	3.022	181.294	2.353	2.991	4.827	3.856	2.272	4.444	5.046	77.4	181.294266336177
21	Subbasin-27	47.444	79.2	17.40755	0.1165	2.626262626	55858.04274	11.65	3.974	2.384	143.062	2.566	2.962	4.129	3.505	2.560	3.958	3.982	79.2	143.062146120883
22	Subbasin-28	34.777	79	13.47661	0.12035	2.658227848	43244.28523	12.035	3.206	1.923	115.400	2.162	2.413	3.348	3.084	2.242	3.238	3.212	79	115.400344878911
23	Subbasin-29	6.9194	78.5	5.23664	0.11644	2.738853503	16803.5399	11.644	1.553	0.932	55.922	0.980	1.046	1.638	1.993	1.163	1.589	1.557	78.5	55.9221796612006
24	Subbasin-3	20.968	82.2	11.92484	0.09107	2.165450122	38264.90359	9.107	3.020	1.812	108.706	1.930	2.250	3.393	3.109	1.910	3.111	3.026	82.2	108.706449702763
25	Subbasin-30	4.2906	80.6	5.02613	0.14179	2.406947891	16128.04699	14.179	1.276	0.766	45.951	0.700	0.798	1.471	1.867	0.924	1.483	1.279	80.6	45.9511215645058
26	Subbasin-31	9.2706	73.4	5.97791	0.22796	3.623978202	19182.15672	22.796	1.432	0.859	51.558	0.811	0.861	1.400	1.812	1.169	1.546	1.435	73.4	51.5581490782418
27	Subbasin-32	13.499	74.7	8.25336	0.19979	3.386880857	26483.7117	19.979	1.909	1.145	68.707	1.045	1.161	1.888	2.174	1.395	2.026	1.912	74.7	68.7073099028344
28	Subbasin-33	9.6625	72.4	7.9757	0.28717	3.812154696	25592.74519	28.717	1.653	0.992	59.492	0.738	0.856	1.600	1.965	1.144	1.843	1.656	72.4	59.4921027824529
29	Subbasin-34	4.2169	80.1	4.13131	0.10773	2.484394507	13256.71278	10.773	1.272	0.763	45.779	0.796	0.852	1.406	1.816	0.962	1.346	1.274	80.1	45.7790864033845
30	Subbasin-35	6.6012	82	6.89138	0.08236	2.195121951	22113.3358	8.236	2.061	1.237	74.200	1.138	1.342	2.312	2.460	1.210	2.090	2.065	82	74.2000326579438
31	Subbasin-36	23.322	81.6	10.66595	0.09991	2.254901961	34225.327	9.991	2.689	1.613	96.794	1.943	2.145	3.004	2.887	1.964	2.809	2.694	81.6	96.7938564373521
32	Subbasin-37	6.7694	72	4.6992	0.28467	3.888888889	15078.98093	28.467	1.099	0.660	39.570	0.620	0.641	1.068	1.535	0.990	1.235	1.101	72	39.5704973859773
33	Subbasin-38	0.3494	81.4	1.08943	0.15179	2.285012285	3495.806561	15.179	0.354	0.212	12.741	0.193	0.201	0.441	0.895	0.327	0.458	0.355	81.4	12.7406000335634
34	Subbasin-39	3.2006	77.5	4.71326	0.17558	2.903225806	15124.09722	17.558	1.198	0.719	43.141	0.543	0.636	1.289	1.723	0.790	1.356	1.201	77.5	43.141204748562
35	Subbasin-4	18.741	75.6	10.99435	0.12056	3.227513228	35279.11005	12.056	3.011	1.807	108.410	1.586	1.834	2.861	2.802	1.739	2.773	3.017	75.6	108.410066117931
36	Subbasin-40	10.409	77.3	9.37956	0.11066	2.936610608	30097.50731	11.066	2.633	1.580	94.801	1.233	1.493	2.616	2.653	1.387	2.498	2.639	77.3	94.8008999828698
37	Subbasin-41	0.5481	77.1	1.40763	0.33933	2.970168612	4516.859449	33.933	0.332	0.199	11.943	0.162	0.170	0.395	0.836	0.343	0.478	0.332	77.1	11.9432369443872
38	Subbasin-42	7.6819	78.5	6.70588	0.09175	2.738853503	21518.09598	9.175	2.133	1.280	76.781	1.164	1.325	2.172	2.368	1.264	2.006	2.137	78.5	76.7811476781808
39	Subbasin-43	5.6187	79.1	4.9538	0.13388	2.642225032	15895.95159	13.388	1.361	0.816	48.981	0.824	0.894	1.487	1.879	1.043	1.483	1.363	79.1	48.9807877093995
40	Subbasin-44	8.6906	76.8	6.47628	0.12591	3.020833333	20781.34632	12.591	1.863	1.118	67.070	1.056	1.165	1.872	2.163	1.260	1.840	1.867	76.8	67.0699112181027
41	Subbasin-45	30.161	75.1	11.20471	0.17352	3.315579228	35954.12164	17.352	2.586	1.551	93.078	1.677	1.802	2.523	2.595	1.987	2.625	2.591	75.1	93.0784606934131
42	Subbasin-46	3.1644	75.4	4.54418	0.2331	3.262599469	14581.54655	23.31	1.074	0.645	38.676	0.469	0.543	1.124	1.584	0.750	1.250	1.076	75.4	38.6760000561304
43	Subbasin-47	17.005	78	7.58946	0.18824	2.820512821	24353.36283	18.824	1.669	1.001	60.086	1.209	1.256	1.811	2.120	1.549	1.923	1.672	78	60.0860986670305
44	Subbasin-48	4.3887	74	3.8856	0.25899	3.513513514	12468.2687	25.899	0.936	0.562	33.695	0.523	0.546	0.957	1.436	0.842	1.088	0.938	74	33.6946847263521
45	Subbasin-49	7.4606	74.4	6.00484	0.25476	3.440860215	19268.57079	25.476	1.322	0.793	47.582	0.688	0.759	1.346	1.769	1.050	1.519	1.324	74.4	47.5815520112962
46	Subbasin-5	11.764	81	8.94494	0.09199	2.345679012	28702.88127	9.199	2.481	1.489	89.332	1.438	1.679	2.708	2.710	1.504	2.496	2.486	81	89.3319318673199
47	Subbasin-50	8.0656	75.6	8.45499	0.25301	3.227513228	27130.71011	25.301	1.685	1.011	60.654	0.718	0.876	1.757	2.080	1.085	1.973	1.688	75.6	60.6536886403035
48	Subbasin-51	0.0062	98	0.11339	0.02538	0.2040816327	363.8503676	2.538	0.070	0.042	2.526	0.063	0.060	0.154	0.471	0.085	0.115	0.070	98	2.52551089915034
49	Subbasin-52	75.497	76.3	26.03791	0.19208	3.106159895	83551.48712	19.208	4.659	2.796	167.736	2.521	3.079	4.644	3.766	2.845	4.888	4.669	76.3	167.735513733462
50	Subbasin-53	17.786	81.5	8.7541	0.11701	2.26993865	28090.50624	11.701	2.128	1.277	76.615	1.568	1.696	2.428	2.535	1.711	2.346	2.132	81.5	76.6145995337168
51	Subbasin-54	2.4812	88.1	3.87184	0.04847	1.350737798	12424.11507	4.847	1.367	0.820	49.194	0.910	1.042	1.819	2.125	0.886	1.492	1.369	88.1	49.194487991678
52	Subbasin-55	0.0281	79	0.25392	0.01948	2.658227848	814.7886528	1.948	0.332	0.199	11.960	0.153	0.149	0.317	0.732	0.165	0.224	0.333	79	11.9599310771274
53	Subbasin-6	9.2137	79.2	7.13501	0.10877	2.626262626	22895.10549	10.877	2.015	1.209	72.537	1.170	1.320	2.133	2.342	1.323	2.036	2.019	79.2	72.5368483547601
54	Subbasin-7	13.941	76.4	11.91329	0.08773	3.089005236	38227.84148	8.773	3.678	2.207	132.391	1.603	2.001	3.439	3.135	1.626	3.131	3.685	76.4	132.391399345644
55	Subbasin-8	28.956	74.2	16.37441	0.16151	3.477088949	52542.86178	16.151	3.725	2.235	134.093	1.703	2.091	3.474	3.154	1.978	3.551	3.732	74.2	134.092943897831
56	Subbasin-9	17.383	79.5	9.28045	0.11004	2.578616352	29779.47918	11.004	2.449	1.470	88.177	1.598	1.769	2.601	2.643	1.713	2.481	2.454	79.5	88.1772674870092
57	Total	888.89	77.41	91.39604	0.14624	2.918227619	293275.269	14.624	14.111	8.466	507.981	9.914	12.186	13.564	7.244	8.190	13.368	14.139	79.6
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59								Hm	333.209
60												Here, the SCS Lag Equation (1972) is suitable for the agricultural watersheds and it seems to be suitable one in our case as our
61												watershed has nearly 37% of its area covered by agriculture land. However, while comparing the values for time of
62												concentration from different empirical equations (used in European countries) applied to overall Ahr catchment, it is found that Tc varies from 491.4 to 1053.3 minutes.
63					146.24						Time in concentration values in minutes:
64											Tc h (NRSC)	Giandotti (central and Northern Italy)	Tc h (Ventura, Italy)	Tc h (Passini, Italy)	Tc h (Kirpich) (central Europe)	Tc h (UK, NERC 1975)	Tc h (Dooge) (Ireland)	Tc h (Temez) (Spain)	Tc h (SCS Lag Equation (1972))
65											846.6	1053.3	594.9	731.1	813.9	434.7	491.4	802.1	848.3
66										T_lag	508.0	632.0	356.9	438.7	488.3	260.8	294.8	481.2	509.0
67
68												While averaging the Tc values obtained from equations developed for European countries (Spain, central Europe, UK, Italy):
69												703.04 minutes
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